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        "text": "An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.\n\nRed 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.",
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        "text": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: ima: don\u0027t clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)\n\n* kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)\n\n* kernel: smb: client: fix OOB reads parsing symlink error response (CVE-2026-31613)\n\n* kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)\n\n* kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)\n\n* kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing (CVE-2026-43279)\n\n* kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete (CVE-2026-46116)\n\n* kernel: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (CVE-2026-46189)\n\n* kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() (CVE-2026-46209)\n\n* kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)\n\nBug Fix(es) and Enhancement(s):\n\n* [FJ8.6 Bug]: Backport request of \"mm: swap: get rid of livelock in swapin readahead\" to RHEL 8.4 AUS (JIRA:RHEL-182028)\n\nFor 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.",
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        "text": "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.",
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        "id": "CWE-354",
        "name": "Improper Validation of Integrity Check Value"
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      "discovery_date": "2025-12-16T00:00:00+00:00",
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          "text": "2422699"
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        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nima: don\u0027t clear IMA_DIGSIG flag when setting or removing non-IMA xattr\n\nCurrently when both IMA and EVM are in fix mode, the IMA signature will\nbe reset to IMA hash if a program first stores IMA signature in\nsecurity.ima and then writes/removes some other security xattr for the\nfile.\n\nFor example, on Fedora, after booting the kernel with \"ima_appraise=fix\nevm=fix ima_policy=appraise_tcb\" and installing rpm-plugin-ima,\ninstalling/reinstalling a package will not make good reference IMA\nsignature generated. Instead IMA hash is generated,\n\n    # getfattr -m - -d -e hex /usr/bin/bash\n    # file: usr/bin/bash\n    security.ima=0x0404...\n\nThis happens because when setting security.selinux, the IMA_DIGSIG flag\nthat had been set early was cleared. As a result, IMA hash is generated\nwhen the file is closed.\n\nSimilarly, IMA signature can be cleared on file close after removing\nsecurity xattr like security.evm or setting/removing ACL.\n\nPrevent replacing the IMA file signature with a file hash, by preventing\nthe IMA_DIGSIG flag from being reset.\n\nHere\u0027s a minimal C reproducer which sets security.selinux as the last\nstep which can also replaced by removing security.evm or setting ACL,\n\n    #include \u003cstdio.h\u003e\n    #include \u003csys/xattr.h\u003e\n    #include \u003cfcntl.h\u003e\n    #include \u003cunistd.h\u003e\n    #include \u003cstring.h\u003e\n    #include \u003cstdlib.h\u003e\n\n    int main() {\n        const char* file_path = \"/usr/sbin/test_binary\";\n        const char* hex_string = \"030204d33204490066306402304\";\n        int length = strlen(hex_string);\n        char* ima_attr_value;\n        int fd;\n\n        fd = open(file_path, O_WRONLY|O_CREAT|O_EXCL, 0644);\n        if (fd == -1) {\n            perror(\"Error opening file\");\n            return 1;\n        }\n\n        ima_attr_value = (char*)malloc(length / 2 );\n        for (int i = 0, j = 0; i \u003c length; i += 2, j++) {\n            sscanf(hex_string + i, \"%2hhx\", \u0026ima_attr_value[j]);\n        }\n\n        if (fsetxattr(fd, \"security.ima\", ima_attr_value, length/2, 0) == -1) {\n            perror(\"Error setting extended attribute\");\n            close(fd);\n            return 1;\n        }\n\n        const char* selinux_value= \"system_u:object_r:bin_t:s0\";\n        if (fsetxattr(fd, \"security.selinux\", selinux_value, strlen(selinux_value), 0) == -1) {\n            perror(\"Error setting extended attribute\");\n            close(fd);\n            return 1;\n        }\n\n        close(fd);\n\n        return 0;\n    }",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ima: don\u0027t clear IMA_DIGSIG flag when setting or removing non-IMA xattr",
          "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"
        }
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          "url": "https://access.redhat.com/security/cve/CVE-2025-68183"
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          "url": "https://lore.kernel.org/linux-cve-announce/2025121632-CVE-2025-68183-f588@gregkh/T"
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          "details": "Moderate"
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      "title": "kernel: ima: don\u0027t clear IMA_DIGSIG flag when setting or removing non-IMA xattr"
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    {
      "cve": "CVE-2025-68724",
      "cwe": {
        "id": "CWE-190",
        "name": "Integer Overflow or Wraparound"
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      "discovery_date": "2025-12-24T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2424886"
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      "notes": [
        {
          "category": "description",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id\n\nUse check_add_overflow() to guard against potential integer overflows\nwhen adding the binary blob lengths and the size of an asymmetric_key_id\nstructure and return ERR_PTR(-EOVERFLOW) accordingly. This prevents a\npossible buffer overflow when copying data from potentially malicious\nX.509 certificate fields that can be arbitrarily large, such as ASN.1\nINTEGER serial numbers, issuer names, etc.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id",
          "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"
        }
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2025-68724"
        },
        {
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424886"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2025-68724",
          "url": "https://www.cve.org/CVERecord?id=CVE-2025-68724"
        },
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-68724",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-68724"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2025122404-CVE-2025-68724-4d3c@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2025122404-CVE-2025-68724-4d3c@gregkh/T"
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          "date": "2026-07-30T05:21:03+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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        "id": "CWE-125",
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          "text": "2461480"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Server Message Block (SMB) client. A remote, untrusted server could send a specially crafted symlink error response, leading to an out-of-bounds read vulnerability. This could result in the disclosure of sensitive information from the kernel\u0027s memory to a local user through the readlink(2) system call.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: smb: client: fix OOB reads parsing symlink error response",
          "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"
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31613"
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          "url": "https://lore.kernel.org/linux-cve-announce/2026042422-CVE-2026-31613-b061@gregkh/T"
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      "title": "kernel: smb: client: fix OOB reads parsing symlink error response"
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      "cve": "CVE-2026-31684",
      "cwe": {
        "id": "CWE-1285",
        "name": "Improper Validation of Specified Index, Position, or Offset in Input"
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      "discovery_date": "2026-04-25T00:00:00+00:00",
      "ids": [
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          "text": "2461757"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s network scheduler component. A remote attacker could send specially crafted network packets containing nested Virtual Local Area Network (VLAN) headers. This could cause the kernel to read beyond allocated memory, leading to a system crash and a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: net: sched: act_csum: validate nested VLAN headers",
          "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"
        }
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          "url": "https://access.redhat.com/security/cve/CVE-2026-31684"
        },
        {
          "category": "external",
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461757"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-31684",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-31684"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-31684",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31684"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026042545-CVE-2026-31684-6974@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026042545-CVE-2026-31684-6974@gregkh/T"
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      "release_date": "2026-04-25T00:00:00+00:00",
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      "ids": [
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          "text": "2464369"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s netfilter subsystem, specifically within the `nf_conntrack_helper`. When a connection tracking helper is unregistered, its associated expectations are not properly cleaned up. This oversight can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A local attacker could exploit this to cause a system crash, resulting in a Denial of Service (DoS), or potentially achieve privilege escalation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup",
          "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"
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43027"
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          "category": "external",
          "summary": "RHBZ#2464369",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464369"
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43027",
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43027"
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        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050159-CVE-2026-43027-5711@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050159-CVE-2026-43027-5711@gregkh/T"
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          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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        "id": "CWE-787",
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          "text": "2467215"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s ALSA (Advanced Linux Sound Architecture) USB audio subsystem. An inconsistency in how USB audio playback and capture streams are handled can lead to an out-of-bounds write to a memory buffer. This can result in a system crash, causing a denial of service for a local user.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: ALSA: usb-audio: Add sanity check for OOB writes at silencing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "ALSA USB audio could write past the silent URB transfer buffer when implicit feedback stream sizing was inconsistent, causing a constrained kernel buffer overwrite with likely crash/DoS impact. Exploitation requires a specific USB audio device/configuration.",
          "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"
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-43279"
        },
        {
          "category": "external",
          "summary": "RHBZ#2467215",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467215"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-43279",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-43279"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43279"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43279-4530@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026050613-CVE-2026-43279-4530@gregkh/T"
        }
      ],
      "release_date": "2026-05-06T00:00:00+00:00",
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          "date": "2026-07-30T05:21:03+00:00",
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
            "version": "3.1"
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    {
      "cve": "CVE-2026-46116",
      "cwe": {
        "id": "CWE-763",
        "name": "Release of Invalid Pointer or Reference"
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      "discovery_date": "2026-05-28T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2482523"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s `xfrm` (IPSec framework) subsystem. This vulnerability, a use-after-free, occurs when the system incorrectly manages memory related to security policies, specifically during the deletion of `xfrm_state` lists. An attacker with local access could exploit this flaw by triggering specific operations, leading to memory corruption. This could cause the system to become unstable, resulting in crashes or a Denial of Service (DoS), and potentially allow for unauthorized access to sensitive information or increased privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete",
          "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"
        }
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      "title": "kernel: xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete"
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    {
      "cve": "CVE-2026-46135",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
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      "discovery_date": "2026-05-28T00:00:00+00:00",
      "ids": [
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          "system_name": "Red Hat Bugzilla ID",
          "text": "2482654"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s NVMe over TCP (nvmet-tcp) implementation. A race condition exists between the handling of an Initialization Connection Request (ICReq) and the teardown of a queue. A remote attacker, by sending an ICReq and immediately closing the connection, could trigger a double free vulnerability. This could lead to a denial of service (DoS) due to memory corruption.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: nvmet-tcp: fix race between ICReq handling and queue teardown",
          "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"
        }
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          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46135"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46135"
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        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46135-6f53@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052818-CVE-2026-46135-6f53@gregkh/T"
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          "date": "2026-07-30T05:21:03+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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      "title": "kernel: nvmet-tcp: fix race between ICReq handling and queue teardown"
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      "cve": "CVE-2026-46189",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
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      "discovery_date": "2026-05-28T00:00:00+00:00",
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          "text": "2482588"
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        {
          "category": "description",
          "text": "A flaw was found in the Linux kernel, specifically within the RDMA (Remote Direct Memory Access) vmw_pvrdma module. This vulnerability is a double free, which means the system attempts to release the same memory resource twice. This can occur in an error handling path within the `pvrdma_alloc_ucontext()` function. Exploiting this flaw could lead to memory corruption or cause the system to become unavailable, resulting in a denial of service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path",
          "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"
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46189"
        },
        {
          "category": "external",
          "summary": "RHBZ#2482588",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482588"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46189",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46189"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46189",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46189"
        },
        {
          "category": "external",
          "summary": "https://lore.kernel.org/linux-cve-announce/2026052831-CVE-2026-46189-c188@gregkh/T",
          "url": "https://lore.kernel.org/linux-cve-announce/2026052831-CVE-2026-46189-c188@gregkh/T"
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          "category": "vendor_fix",
          "date": "2026-07-30T05:21:03+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe system must be rebooted for this update to take effect.",
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      "cwe": {
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          "text": "2482636"
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          "category": "description",
          "text": "A flaw was found in the Linux kernel\u0027s Direct Rendering Manager (DRM) Graphics Execution Manager (GEM) component. This vulnerability arises from an inconsistent calculation of plane dimensions, which can lead to incorrect memory allocation checks. A local attacker could exploit this by creating a specially crafted Graphics Execution Manager (GEM) object that bypasses security validations. This could allow the GPU to access memory outside its designated area, potentially leading to memory corruption, information disclosure, or the execution of unauthorized code.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A Moderate flaw was found in the Linux kernel\u0027s Direct Rendering Manager (DRM) Graphics Execution Manager (GEM) component. This vulnerability allows a local attacker to craft a GEM object that bypasses memory allocation checks due to inconsistent plane dimension calculations. Successful exploitation could lead to memory corruption, information disclosure, or arbitrary code execution by enabling the GPU to access memory beyond allocated bounds.",
          "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"
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          "url": "https://access.redhat.com/errata/RHSA-2026:47633"
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      "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"
          },
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
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      ],
      "title": "kernel: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()"
    }
  ]
}