rhsa-2025:14511
Vulnerability from csaf_redhat
Published
2025-08-25 14:05
Modified
2025-10-09 21:48
Summary
Red Hat Security Advisory: kernel security update
Notes
Topic
An update for kernel is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
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
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: can: peak_usb: fix use after free bugs (CVE-2021-47670)
* kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc (CVE-2025-37890)
* kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice (CVE-2025-38001)
* kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue() (CVE-2025-38000)
* kernel: crypto: algif_hash - fix double free in hash_accept (CVE-2025-38079)
* kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead (CVE-2022-49977)
* kernel: sch_hfsc: make hfsc_qlen_notify() idempotent (CVE-2025-38177)
* kernel: net/sched: Always pass notifications when child class becomes empty (CVE-2025-38350)
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.
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.
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"text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: peak_usb: fix use after free bugs\n\nAfter calling peak_usb_netif_rx_ni(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is accessed\nafter the peak_usb_netif_rx_ni().\n\nReordering the lines solves the issue.",
"title": "Vulnerability description"
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"text": "kernel: can: peak_usb: fix use after free bugs",
"title": "Vulnerability summary"
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{
"category": "other",
"text": "An unprivileged user with device access could potentially trigger a use-after-free vulnerability. However, this would require them to interact with the CAN device in a highly specific and difficult-to-automate manner to create the necessary conditions within the kernel driver.",
"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/security/cve/CVE-2021-47670"
},
{
"category": "external",
"summary": "RHBZ#2360786",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360786"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2021-47670",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-47670"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2021-47670",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47670"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025041734-CVE-2021-47670-2b77@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025041734-CVE-2021-47670-2b77@gregkh/T"
}
],
"release_date": "2025-04-17T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: can: peak_usb: fix use after free bugs"
},
{
"cve": "CVE-2022-49977",
"cwe": {
"id": "CWE-763",
"name": "Release of Invalid Pointer or Reference"
},
"discovery_date": "2025-06-18T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2373574"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead\n\nftrace_startup does not remove ops from ftrace_ops_list when\nftrace_startup_enable fails:\n\nregister_ftrace_function\n ftrace_startup\n __register_ftrace_function\n ...\n add_ftrace_ops(\u0026ftrace_ops_list, ops)\n ...\n ...\n ftrace_startup_enable // if ftrace failed to modify, ftrace_disabled is set to 1\n ...\n return 0 // ops is in the ftrace_ops_list.\n\nWhen ftrace_disabled = 1, unregister_ftrace_function simply returns without doing anything:\nunregister_ftrace_function\n ftrace_shutdown\n if (unlikely(ftrace_disabled))\n return -ENODEV; // return here, __unregister_ftrace_function is not executed,\n // as a result, ops is still in the ftrace_ops_list\n __unregister_ftrace_function\n ...\n\nIf ops is dynamically allocated, it will be free later, in this case,\nis_ftrace_trampoline accesses NULL pointer:\n\nis_ftrace_trampoline\n ftrace_ops_trampoline\n do_for_each_ftrace_op(op, ftrace_ops_list) // OOPS! op may be NULL!\n\nSyzkaller reports as follows:\n[ 1203.506103] BUG: kernel NULL pointer dereference, address: 000000000000010b\n[ 1203.508039] #PF: supervisor read access in kernel mode\n[ 1203.508798] #PF: error_code(0x0000) - not-present page\n[ 1203.509558] PGD 800000011660b067 P4D 800000011660b067 PUD 130fb8067 PMD 0\n[ 1203.510560] Oops: 0000 [#1] SMP KASAN PTI\n[ 1203.511189] CPU: 6 PID: 29532 Comm: syz-executor.2 Tainted: G B W 5.10.0 #8\n[ 1203.512324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[ 1203.513895] RIP: 0010:is_ftrace_trampoline+0x26/0xb0\n[ 1203.514644] Code: ff eb d3 90 41 55 41 54 49 89 fc 55 53 e8 f2 00 fd ff 48 8b 1d 3b 35 5d 03 e8 e6 00 fd ff 48 8d bb 90 00 00 00 e8 2a 81 26 00 \u003c48\u003e 8b ab 90 00 00 00 48 85 ed 74 1d e8 c9 00 fd ff 48 8d bb 98 00\n[ 1203.518838] RSP: 0018:ffffc900012cf960 EFLAGS: 00010246\n[ 1203.520092] RAX: 0000000000000000 RBX: 000000000000007b RCX: ffffffff8a331866\n[ 1203.521469] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000000000000010b\n[ 1203.522583] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8df18b07\n[ 1203.523550] R10: fffffbfff1be3160 R11: 0000000000000001 R12: 0000000000478399\n[ 1203.524596] R13: 0000000000000000 R14: ffff888145088000 R15: 0000000000000008\n[ 1203.525634] FS: 00007f429f5f4700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000\n[ 1203.526801] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1203.527626] CR2: 000000000000010b CR3: 0000000170e1e001 CR4: 00000000003706e0\n[ 1203.528611] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 1203.529605] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n\nTherefore, when ftrace_startup_enable fails, we need to rollback registration\nprocess and remove ops from ftrace_ops_list.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead",
"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": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2022-49977"
},
{
"category": "external",
"summary": "RHBZ#2373574",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373574"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2022-49977",
"url": "https://www.cve.org/CVERecord?id=CVE-2022-49977"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-49977",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49977"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025061819-CVE-2022-49977-3826@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025061819-CVE-2022-49977-3826@gregkh/T"
}
],
"release_date": "2025-06-18T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead"
},
{
"cve": "CVE-2025-37890",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-05-16T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2366848"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free vulnerability has been identified in the Linux kernel\u0027s HFSC (Hierarchical Fair Service Curve) queuing discipline when it is configured with NETEM (Network Emulation) as a child. This flaw can lead to a kernel panic or crash due to incorrect assumptions about the queue state.\n\nExploitation of this vulnerability requires local access with CAP_NET_ADMIN privileges and control over the qdisc (queueing discipline) setup. A local attacker could leverage this flaw to achieve denial of service or escalate privileges. Given that it affects kernel memory structures, successful exploitation could result in memory corruption, data leaks, or arbitrary write capabilities, leading to a full kernel crash.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "On Red Hat Enterprise Linux 8 and later releases, regular (non-root) users can exploit this issue by abusing unprivileged user namespaces. Red Hat Enterprise Linux 6 and 7 are not affected by this CVE because they did not include the upstream commit that introduced the CVE (37d9cf1).",
"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-2025-37890"
},
{
"category": "external",
"summary": "RHBZ#2366848",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2366848"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-37890",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-37890"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-37890",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-37890"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025051617-CVE-2025-37890-437b@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025051617-CVE-2025-37890-437b@gregkh/T"
}
],
"release_date": "2025-05-16T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
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{
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"details": "To mitigate this issue, prevent module sch_hfsc from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net_sched: hfsc: Fix a UAF vulnerability in class with netem as child qdisc"
},
{
"cve": "CVE-2025-38000",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-06-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2370786"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the HFSC queueing discipline implementation in the Linux kernel. When a packet is enqueued and the child qdisc\u0027s peek() function is called before properly updating the HFSC queue\u0027s length and backlog counters, a race condition can occur. In some cases, the peek operation may trigger an immediate dequeue and drop, leading to inconsistent queue accounting. This may leave an empty HFSC class in the active list, eventually causing use-after-free (UAF) conditions. Due to the nature of this memory corruption (use-after-free or list corruption) in kernel scheduler code, a successful exploit could lead to privilege escalation, data leakage, or denial of service. Therefore, the CIA impact is assessed as HHH to reflect a worst-case.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "On Red Hat Enterprise Linux 8 and later releases, regular (non-root) users can exploit this issue by abusing unprivileged user namespaces. On Red Hat Enterprise Linux 7, unprivileged user namespaces are disabled by default. Red Hat Enterprise Linux 6 did not include support for them at all, meaning that root privileges are necessary to trigger this flaw.",
"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-2025-38000"
},
{
"category": "external",
"summary": "RHBZ#2370786",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370786"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38000",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38000"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38000",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38000"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025060639-CVE-2025-38000-f5a4@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025060639-CVE-2025-38000-f5a4@gregkh/T"
}
],
"release_date": "2025-06-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
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{
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{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()"
},
{
"cve": "CVE-2025-38001",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-06-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2370776"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free (UAF) vulnerability, which also presents a potential infinite loop condition, has been resolved in the Linux kernel. This flaw affects the HFSC (Hierarchical Fair Service Curve) queuing discipline when it is used in conjunction with NETEM (Network Emulation).\n\nA malicious user could exploit this by repeatedly inserting a class into the eltree due to insufficient validation in prior logic, effectively bypassing the protection provided by the HFSC_RSC flag. Successful exploitation could lead to memory corruption, an infinite loop, or a system crash, severely impacting network availability and system stability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "On Red Hat Enterprise Linux 8 and later releases, regular (non-root) users can exploit this issue by abusing unprivileged user namespaces. Red Hat Enterprise Linux 6 and 7 are not affected by this CVE because they did not include the upstream commit that introduced the CVE (37d9cf1).",
"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-2025-38001"
},
{
"category": "external",
"summary": "RHBZ#2370776",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2370776"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38001",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38001"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38001",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38001"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025060650-CVE-2025-38001-f921@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025060650-CVE-2025-38001-f921@gregkh/T"
}
],
"release_date": "2025-06-06T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
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{
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net_sched: hfsc: Address reentrant enqueue adding class to eltree twice"
},
{
"cve": "CVE-2025-38079",
"cwe": {
"id": "CWE-415",
"name": "Double Free"
},
"discovery_date": "2025-06-18T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2373383"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: algif_hash - fix double free in hash_accept\n\nIf accept(2) is called on socket type algif_hash with\nMSG_MORE flag set and crypto_ahash_import fails,\nsk2 is freed. However, it is also freed in af_alg_release,\nleading to slab-use-after-free error.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: crypto: algif_hash - fix double free in hash_accept",
"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": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-38079"
},
{
"category": "external",
"summary": "RHBZ#2373383",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373383"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38079",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38079"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38079",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38079"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025061841-CVE-2025-38079-7fa5@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025061841-CVE-2025-38079-7fa5@gregkh/T"
}
],
"release_date": "2025-06-18T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: crypto: algif_hash - fix double free in hash_accept"
},
{
"cve": "CVE-2025-38177",
"cwe": {
"id": "CWE-459",
"name": "Incomplete Cleanup"
},
"discovery_date": "2025-07-04T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2376354"
}
],
"notes": [
{
"category": "description",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let\u0027s make it idempotent\nto ease qdisc_tree_reduce_backlog() callers\u0027 life:\n\n1. update_vf() decreases cl-\u003ecl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl-\u003eel_node, but we can use\n RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: sch_hfsc: make hfsc_qlen_notify() idempotent",
"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": {
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"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-38177"
},
{
"category": "external",
"summary": "RHBZ#2376354",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376354"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38177",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38177"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38177",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38177"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025070411-CVE-2025-38177-bd6c@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025070411-CVE-2025-38177-bd6c@gregkh/T"
}
],
"release_date": "2025-07-04T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "kernel: sch_hfsc: make hfsc_qlen_notify() idempotent"
},
{
"cve": "CVE-2025-38350",
"cwe": {
"id": "CWE-416",
"name": "Use After Free"
},
"discovery_date": "2025-07-19T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2382054"
}
],
"notes": [
{
"category": "description",
"text": "A use-after-free (UAF) vulnerability was found in the Linux kernel\u0027s net/sched subsystem, specifically in the Credit-Based Shaper (CBS) qdisc implementation (sch_cbs). The vulnerability occurs because the CBS qdisc\u0027s reset function (qdisc_reset_queue()) only resets its internal queue but fails to reset its child qdisc recursively. As a result, a mismatch in queue length (qlen) occurs between CBS and its children during interface resets, eventually allowing attackers to trigger UAF on a parent HFSC scheduler.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "kernel: net/sched: Always pass notifications when child class becomes empty",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "On Red Hat Enterprise Linux 8 and later releases, regular (non-root) users can exploit this issue by abusing unprivileged user namespaces. On Red Hat Enterprise Linux 7, unprivileged user namespaces are disabled by default. Red Hat Enterprise Linux 6 did not include support for them at all, meaning that root privileges are necessary to trigger this flaw.",
"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-2025-38350"
},
{
"category": "external",
"summary": "RHBZ#2382054",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2382054"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-38350",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-38350"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-38350",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38350"
},
{
"category": "external",
"summary": "https://lore.kernel.org/linux-cve-announce/2025071933-CVE-2025-38350-262a@gregkh/T",
"url": "https://lore.kernel.org/linux-cve-announce/2025071933-CVE-2025-38350-262a@gregkh/T"
}
],
"release_date": "2025-07-19T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2025-08-25T14:05:58+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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"url": "https://access.redhat.com/errata/RHSA-2025:14511"
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{
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],
"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "kernel: net/sched: Always pass notifications when child class becomes empty"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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