RHSA-2026:74428

Vulnerability from csaf_redhat - Published: 2026-10-06 13:01 - Updated: 2026-10-07 11:18
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.22.17 bug fix and security update
Severity
Important
Notes
Topic: Red Hat OpenShift Container Platform release 4.22.17 is now available with updates to packages and images that fix several bugs and add enhancements. This release includes a security update for Red Hat OpenShift Container Platform 4.22. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the container images for Red Hat OpenShift Container Platform 4.22.17. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHSA-2026:74427 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/ Security Fix(es): * libevent: Libevent: HTTP header handling bugs create risk of access control bypass. (CVE-2026-63385) * kernel: xfrm: ah6: validate routing header segments_left (CVE-2026-80844) * kernel: net: tun: bound receive headroom (CVE-2026-81000) * unbound: Unbound: Heap buffer overflow via malicious DNSSEC response (CVE-2026-81634) * unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis (CVE-2026-82717) * kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read (CVE-2026-89846) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. All OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-63385

A flaw was found in libevent. The evhttp_decode_uri_internal function in http.c decodes percent-encoded %00 bytes into literal NUL characters without rejecting them, allowing an attacker to craft a URI such as /admin/secret%00.jpg where extension-based access checks see .jpg but the server processes /admin/secret, bypassing path-based access controls. Additionally, evhttp_header_is_valid_value accepts obsolete HTTP header line folding (CRLF followed by SP/HT), which RFC 9112 states new implementations should reject, creating a header injection vector in proxy chains where the frontend rejects obs-fold but libevent accepts it. This could lead to access control bypass, header injection, or request smuggling.

7.7 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected products
Product Identifier Version Remediation
Unresolved product id: 9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0 —
Vendor Fix fix
Workaround
Unresolved product id: 9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-80844

A flaw was found in the Linux kernel's xfrm subsystem, specifically within the AH6 (Authentication Header for IPv6) module. The `ipv6_rearrange_rthdr()` function does not properly validate the `segments_left` field in routing headers when processing raw IPv6 HDRINCL packets. This oversight allows an attacker to craft a malicious packet that can cause an out-of-bounds memory access, potentially leading to memory corruption.

8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE-805 - Buffer Access with Incorrect Length Value
Affected products
Fixed 4 products, the same list as for CVE-2026-63385
Threats
Impact Low
CVE-2026-81000

A flaw was found in the Linux kernel's TUN/TAP driver. An integer underflow vulnerability exists in the tun_get_user() function when processing oversized headroom requests. This can occur if Open vSwitch (OVS) propagates an excessively large headroom request to the TUN or TAP device. Successful exploitation could lead to memory corruption, where network packet data is written outside its intended buffer, potentially causing a denial of service or other system instability.

7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 4 products, the same list as for CVE-2026-63385
Threats
Impact Low
CVE-2026-81634

A flaw was found in Unbound. This vulnerability allows a remote attacker to cause a heap buffer overflow during the processing of DNSSEC responses. By sending a specially crafted DNSSEC response, a malicious server or an attacker tampering with network traffic can trigger this flaw. This could lead to a denial of service, making the Unbound service unavailable.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-122 - Heap-based Buffer Overflow
Affected products
Fixed 4 products, the same list as for CVE-2026-63385
Threats
Impact Important
CVE-2026-82717

A flaw was found in Unbound. Improper handling of buffer positions and compression pointers in Unbound's CNAME synthesis allows a remote attacker to corrupt heap memory via upstream DNS responses. This vulnerability can result in a denial of service (DoS) or, under specific conditions, remote code execution (RCE).

8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-787 - Out-of-bounds Write
Affected products
Fixed 4 products, the same list as for CVE-2026-63385
Threats
Impact Important
CVE-2026-89846

A flaw was found in the Linux kernel's `scsi: qla2xxx` driver. A remote attacker, by sending a specially crafted Fibre Channel Protocol (FCP) response, could cause an integer underflow. This underflow leads to an out-of-bounds read when handling sense data, potentially disclosing sensitive memory information from the kernel's heap.

7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 4 products, the same list as for CVE-2026-63385
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:74428 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=2520666 external
https://bugzilla.redhat.com/show_bug.cgi?id=2528676 external
https://bugzilla.redhat.com/show_bug.cgi?id=2532176 external
https://bugzilla.redhat.com/show_bug.cgi?id=2535051 external
https://bugzilla.redhat.com/show_bug.cgi?id=2535054 external
https://bugzilla.redhat.com/show_bug.cgi?id=2535391 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-63385 self
https://bugzilla.redhat.com/show_bug.cgi?id=2520666 external
https://www.cve.org/CVERecord?id=CVE-2026-63385 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63385 external
https://github.com/libevent/libevent/commit/758be… external
https://github.com/libevent/libevent/commit/9170d… external
https://github.com/libevent/libevent/releases/tag… external
https://github.com/libevent/libevent/releases/tag… external
https://github.com/libevent/libevent/security/adv… external
https://access.redhat.com/security/cve/CVE-2026-80844 self
https://bugzilla.redhat.com/show_bug.cgi?id=2528676 external
https://access.redhat.com/security/vulnerabilitie… external
https://www.cve.org/CVERecord?id=CVE-2026-80844 external
https://nvd.nist.gov/vuln/detail/CVE-2026-80844 external
https://git.kernel.org/pub/scm/linux/security/vul… external
https://access.redhat.com/security/cve/CVE-2026-81000 self
https://bugzilla.redhat.com/show_bug.cgi?id=2532176 external
https://www.cve.org/CVERecord?id=CVE-2026-81000 external
https://nvd.nist.gov/vuln/detail/CVE-2026-81000 external
https://git.kernel.org/pub/scm/linux/security/vul… external
https://access.redhat.com/security/cve/CVE-2026-81634 self
https://bugzilla.redhat.com/show_bug.cgi?id=2535054 external
https://www.cve.org/CVERecord?id=CVE-2026-81634 external
https://nvd.nist.gov/vuln/detail/CVE-2026-81634 external
https://www.nlnetlabs.nl/downloads/unbound/CVE-20… external
https://access.redhat.com/security/cve/CVE-2026-82717 self
https://bugzilla.redhat.com/show_bug.cgi?id=2535051 external
https://www.cve.org/CVERecord?id=CVE-2026-82717 external
https://nvd.nist.gov/vuln/detail/CVE-2026-82717 external
https://www.nlnetlabs.nl/downloads/unbound/CVE-20… external
https://access.redhat.com/security/cve/CVE-2026-89846 self
https://bugzilla.redhat.com/show_bug.cgi?id=2535391 external
https://www.cve.org/CVERecord?id=CVE-2026-89846 external
https://nvd.nist.gov/vuln/detail/CVE-2026-89846 external
https://git.kernel.org/pub/scm/linux/security/vul… external
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          "summary": "https://github.com/libevent/libevent/commit/9170dd35e64714613e8d13b290587cfc28e258e2",
          "url": "https://github.com/libevent/libevent/commit/9170dd35e64714613e8d13b290587cfc28e258e2"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.1.13-stable"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha",
          "url": "https://github.com/libevent/libevent/releases/tag/release-2.2.2-alpha"
        },
        {
          "category": "external",
          "summary": "https://github.com/libevent/libevent/security/advisories/GHSA-jcwh-pvf2-73p2",
          "url": "https://github.com/libevent/libevent/security/advisories/GHSA-jcwh-pvf2-73p2"
        }
      ],
      "release_date": "2026-08-20T17:55:36.214000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
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            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "libevent: Libevent: HTTP header handling bugs create risk of access control bypass."
    },
    {
      "cve": "CVE-2026-80844",
      "cwe": {
        "id": "CWE-805",
        "name": "Buffer Access with Incorrect Length Value"
      },
      "discovery_date": "2026-09-04T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2528676"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s xfrm subsystem, specifically within the AH6 (Authentication Header for IPv6) module. The `ipv6_rearrange_rthdr()` function does not properly validate the `segments_left` field in routing headers when processing raw IPv6 HDRINCL packets. This oversight allows an attacker to craft a malicious packet that can cause an out-of-bounds memory access, potentially leading to memory corruption.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: xfrm: ah6: validate routing header segments_left",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue is classified as Important severity because exploitation can be achieved by a local attacker with unprivileged user access. An attack could leverage user namespaces to obtain elevated network permissions within the namespace, then sends specially crafted IPv6 packets with malformed Authentication Header routing headers. Exploitation is challenging but achievable due to complex setup including IPv6 AH/XFRM, ESP-in-UDP encapsulation, and specific timing and memory layout conditions. This memory corruption can enable local privilege escalation to root from an unprivileged user account.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      "references": [
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          "category": "self",
          "summary": "Canonical URL",
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        },
        {
          "category": "external",
          "summary": "RHBZ#2528676",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2528676"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-011",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-011"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-80844",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-80844"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-80844",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80844"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80844.mbox",
          "url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80844.mbox"
        }
      ],
      "release_date": "2026-09-04T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        },
        {
          "category": "workaround",
          "details": "See the security bulletin for a detailed mitigation procedure.",
          "product_ids": [
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
            "version": "3.1"
          },
          "products": [
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            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kernel: xfrm: ah6: validate routing header segments_left"
    },
    {
      "cve": "CVE-2026-81000",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-09-11T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2532176"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s TUN/TAP driver. An integer underflow vulnerability exists in the tun_get_user() function when processing oversized headroom requests. This can occur if Open vSwitch (OVS) propagates an excessively large headroom request to the TUN or TAP device. Successful exploitation could lead to memory corruption, where network packet data is written outside its intended buffer, potentially causing a denial of service or other system instability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net: tun: bound receive headroom",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
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      },
      "references": [
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-81000"
        },
        {
          "category": "external",
          "summary": "RHBZ#2532176",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532176"
        },
        {
          "category": "external",
          "summary": "RHSB-2026-011",
          "url": "https://access.redhat.com/security/vulnerabilities/RHSB-2026-011"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-81000",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-81000"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-81000",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81000"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81000.mbox",
          "url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81000.mbox"
        }
      ],
      "release_date": "2026-09-11T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        },
        {
          "category": "workaround",
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "kernel: net: tun: bound receive headroom"
    },
    {
      "cve": "CVE-2026-81634",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2026-09-16T08:53:19.884865+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2535054"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Unbound. This vulnerability allows a remote attacker to cause a heap buffer overflow during the processing of DNSSEC responses. By sending a specially crafted DNSSEC response, a malicious server or an attacker tampering with network traffic can trigger this flaw. This could lead to a denial of service, making the Unbound service unavailable.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "unbound: Unbound: Heap buffer overflow via malicious DNSSEC response",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important flaw where Unbound, when acting as a recursive DNS resolver, is vulnerable to a heap buffer overflow. A remote attacker could exploit this by operating a malicious name server or by intercepting and manipulating DNS responses, potentially leading to a denial of service or arbitrary code execution. This risk is heightened in deployments where Unbound processes queries from untrusted sources.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-81634"
        },
        {
          "category": "external",
          "summary": "RHBZ#2535054",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2535054"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-81634",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-81634"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-81634",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81634"
        },
        {
          "category": "external",
          "summary": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-81634.txt",
          "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-81634.txt"
        }
      ],
      "release_date": "2026-09-16T08:30:15.428000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "unbound: Unbound: Heap buffer overflow via malicious DNSSEC response"
    },
    {
      "cve": "CVE-2026-82717",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-09-16T08:51:07.266602+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2535051"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Unbound. Improper handling of buffer positions and compression pointers in Unbound\u0027s CNAME synthesis allows a remote attacker to corrupt heap memory via upstream DNS responses. This vulnerability can result in a denial of service (DoS) or, under specific conditions, remote code execution (RCE).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important vulnerability in Unbound that could lead to remote code execution due to heap memory corruption during CNAME synthesis. As Unbound is a critical DNS resolver component in Red Hat environments, successful exploitation could severely impact service availability and integrity. The complexity of exploiting heap memory corruption may limit immediate widespread attacks.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-82717"
        },
        {
          "category": "external",
          "summary": "RHBZ#2535051",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2535051"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-82717",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-82717"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-82717",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82717"
        },
        {
          "category": "external",
          "summary": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-82717.txt",
          "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-82717.txt"
        }
      ],
      "release_date": "2026-09-16T08:31:59.417000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        },
        {
          "category": "workaround",
          "details": "To mitigate this restrict Unbound to trusted clients and limit which upstream name servers it can query. If Unbound is unused, disable or remove the service. Apply process/cgroup limits to contain crash impact.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "unbound: Unbound: Remote Code Execution Vulnerability in CNAME Synthesis"
    },
    {
      "cve": "CVE-2026-89846",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2026-09-16T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2535391"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s `scsi: qla2xxx` driver. A remote attacker, by sending a specially crafted Fibre Channel Protocol (FCP) response, could cause an integer underflow. This underflow leads to an out-of-bounds read when handling sense data, potentially disclosing sensitive memory information from the kernel\u0027s heap.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
          "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-89846"
        },
        {
          "category": "external",
          "summary": "RHBZ#2535391",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2535391"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-89846",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-89846"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-89846",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89846"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89846.mbox",
          "url": "https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89846.mbox"
        }
      ],
      "release_date": "2026-09-16T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-06T13:01:23+00:00",
          "details": "For OpenShift Container Platform 4.22 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update:\n\nhttps://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html/release_notes/\n\nYou may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags.\n\nThe sha values for the release are as follows:\n\n      (For x86_64 architecture)\n      The image digest is sha256:9bde31879df303de7db7c100878393a520215f33815d0d9b188e3b4436c876a7\n\n      (For s390x architecture)\n      The image digest is sha256:41d57f38fe018b5dcfb3698eb4630f406ec7546f67819d55acd134c3a2e5827a\n\n      (For ppc64le architecture)\n      The image digest is sha256:160d848722ca2e69777f512ff36adbd5485854b9905e0813aceecf83d549f5a2\n\n      (For aarch64 architecture)\n      The image digest is sha256:b040b4af870284b4fcec18283bac700a5d3a0162cec2101a235dfa9a5f005b14\n\nAll OpenShift Container Platform 4.22 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.22/html-single/updating_clusters/index#updating-cluster-cli.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:74428"
        },
        {
          "category": "workaround",
          "details": "If QLogic Fibre Channel HBAs are not in use, the \u0027qla2xxx\u0027 kernel module can be blacklisted to prevent it from loading. This can be achieved by creating a modprobe configuration file.\n\nTo blacklist the module:\n1. Create a file named `/etc/modprobe.d/blacklist-qla2xxx.conf` with the following content:\n   `blacklist qla2xxx`\n2. Regenerate the initramfs to ensure the blacklist is applied during boot:\n   `sudo dracut -f -v` (for RHEL 7/8/9)\n   `sudo mkinitcpio -P` (for Arch-based systems, if applicable)\n3. Reboot the system for the changes to take effect.\n\nWarning: Blacklisting this module will disable functionality for QLogic Fibre Channel HBAs. Ensure that this hardware is not required before applying this mitigation. A system reboot is required for the changes to take effect.",
          "product_ids": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "9Base-RHOSE-4.22:rhcos-aarch64-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-ppc64le-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-s390x-4.22.9.8.202609291947-0",
            "9Base-RHOSE-4.22:rhcos-x86_64-4.22.9.8.202609291947-0"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "kernel: scsi: qla2xxx: Bound rsp_info_len to avoid OOB sense-data read"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.