Vulnerability-Lookup

alsa-2026:49871

Vulnerability from osv_almalinux

Published

2026-08-04 00:00

Modified

2026-08-07 08:58

Summary

Moderate: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: Linux kernel: Denial of Service due to NULL function pointer race in timer shutdown (CVE-2025-68214)
kernel: procfs: avoid fetching build ID while holding VMA lock (CVE-2026-23199)

Bug Fix(es) and Enhancement(s):

[Lenovo] Graphics not working on T14 G7 Intel (Pantherlake) (JIRA:AlmaLinux-172832)
Possible regression with FM350GL [almalinux-10.2.z] (JIRA:AlmaLinux-184266)
[10.2 FEAT] CNB102: dpll: sync with upstream (JIRA:AlmaLinux-211011)
backport make module and modules-core provides use variant [almalinux-10.2.z] (JIRA:AlmaLinux-213965)

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.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:49871	ADVISORY
	https://access.redhat.com/security/cve/CVE-2025-68214	REPORT
	https://access.redhat.com/security/cve/CVE-2026-23199	REPORT
	https://bugzilla.redhat.com/2422686	REPORT
	https://bugzilla.redhat.com/2439919	REPORT
	https://errata.almalinux.org/10/ALSA-2026-49871.html	ADVISORY

JSON

To clipboard

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  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.  \n\nSecurity Fix(es):  \n\n  * kernel: Linux kernel: Denial of Service due to NULL function pointer race in timer shutdown (CVE-2025-68214)\n  * kernel: procfs: avoid fetching build ID while holding VMA lock (CVE-2026-23199)\n\n\nBug Fix(es) and Enhancement(s):  \n\n  * [Lenovo] Graphics not working on T14 G7 Intel (Pantherlake) (JIRA:AlmaLinux-172832)\n  * Possible regression with FM350GL [almalinux-10.2.z] (JIRA:AlmaLinux-184266)\n  * [10.2 FEAT] CNB102: dpll: sync with upstream (JIRA:AlmaLinux-211011)\n  * backport make module and modules-core provides use variant [almalinux-10.2.z] (JIRA:AlmaLinux-213965)\n\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.\n",
  "id": "ALSA-2026:49871",
  "modified": "2026-08-07T08:58:33Z",
  "published": "2026-08-04T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:49871"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-68214"
    },
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      "url": "https://access.redhat.com/security/cve/CVE-2026-23199"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2422686"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2439919"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-49871.html"
    }
  ],
  "related": [
    "CVE-2025-68214",
    "CVE-2026-23199"
  ],
  "summary": "Moderate: kernel security, bug fix, and enhancement update"
}

CVE-2025-68214 (GCVE-0-2025-68214)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:57 – Updated: 2026-05-23 16:02

Title

timers: Fix NULL function pointer race in timer_shutdown_sync()

Summary

In the Linux kernel, the following vulnerability has been resolved: timers: Fix NULL function pointer race in timer_shutdown_sync() There is a race condition between timer_shutdown_sync() and timer expiration that can lead to hitting a WARN_ON in expire_timers(). The issue occurs when timer_shutdown_sync() clears the timer function to NULL while the timer is still running on another CPU. The race scenario looks like this: CPU0 CPU1 <SOFTIRQ> lock_timer_base() expire_timers() base->running_timer = timer; unlock_timer_base() [call_timer_fn enter] mod_timer() ... timer_shutdown_sync() lock_timer_base() // For now, will not detach the timer but only clear its function to NULL if (base->running_timer != timer) ret = detach_if_pending(timer, base, true); if (shutdown) timer->function = NULL; unlock_timer_base() [call_timer_fn exit] lock_timer_base() base->running_timer = NULL; unlock_timer_base() ... // Now timer is pending while its function set to NULL. // next timer trigger <SOFTIRQ> expire_timers() WARN_ON_ONCE(!fn) // hit ... lock_timer_base() // Now timer will detach if (base->running_timer != timer) ret = detach_if_pending(timer, base, true); if (shutdown) timer->function = NULL; unlock_timer_base() The problem is that timer_shutdown_sync() clears the timer function regardless of whether the timer is currently running. This can leave a pending timer with a NULL function pointer, which triggers the WARN_ON_ONCE(!fn) check in expire_timers(). Fix this by only clearing the timer function when actually detaching the timer. If the timer is running, leave the function pointer intact, which is safe because the timer will be properly detached when it finishes running.

Severity

No CVSS data available.

Assigner

Linux

References

6 references

URL	Tags
https://git.kernel.org/stable/c/ba43ac025c4318241…
https://git.kernel.org/stable/c/1a975716cc8977f46…
https://git.kernel.org/stable/c/6665fbd7730b26d77…
https://git.kernel.org/stable/c/176725f4848376530…
https://git.kernel.org/stable/c/a01efa7a780c42ac5…
https://git.kernel.org/stable/c/20739af07383e6eb1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: debbcf812d735003c96c5e5968a3cfa4e1fbd1af , < ba43ac025c4318241f8edf94f31d2eebab86991b (git) Affected: 334c33aa487be406a149c8b87c38c8399d2dba8d , < 1a975716cc8977f461e45e28e3e5977d46ad7a6a (git) Affected: 0cc04e80458a822300b93f82ed861a513edde194 , < 6665fbd7730b26d770c232b20d1b907e6a67a914 (git) Affected: 0cc04e80458a822300b93f82ed861a513edde194 , < 176725f4848376530a0f0da9023f956afcc33585 (git) Affected: 0cc04e80458a822300b93f82ed861a513edde194 , < a01efa7a780c42ac5170a949bd95c9786ffcc60a (git) Affected: 0cc04e80458a822300b93f82ed861a513edde194 , < 20739af07383e6eb1ec59dcd70b72ebfa9ac362c (git) Affected: 6.1.158 , < 6.1.159 (semver)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 6.1.159 , ≤ 6.1.* (semver) Unaffected: 6.6.118 , ≤ 6.6.* (semver) Unaffected: 6.12.60 , ≤ 6.12.* (semver) Unaffected: 6.17.10 , ≤ 6.17.* (semver) Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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CVE-2026-23199 (GCVE-0-2026-23199)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-05-11 22:02

Title

procfs: avoid fetching build ID while holding VMA lock

Summary

In the Linux kernel, the following vulnerability has been resolved: procfs: avoid fetching build ID while holding VMA lock Fix PROCMAP_QUERY to fetch optional build ID only after dropping mmap_lock or per-VMA lock, whichever was used to lock VMA under question, to avoid deadlock reported by syzbot: -> #1 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xed/0x170 _copy_to_iter+0x118/0x1720 copy_page_to_iter+0x12d/0x1e0 filemap_read+0x720/0x10a0 blkdev_read_iter+0x2b5/0x4e0 vfs_read+0x7f4/0xae0 ksys_read+0x12a/0x250 do_syscall_64+0xcb/0xf80 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}: __lock_acquire+0x1509/0x26d0 lock_acquire+0x185/0x340 down_read+0x98/0x490 blkdev_read_iter+0x2a7/0x4e0 __kernel_read+0x39a/0xa90 freader_fetch+0x1d5/0xa80 __build_id_parse.isra.0+0xea/0x6a0 do_procmap_query+0xd75/0x1050 procfs_procmap_ioctl+0x7a/0xb0 __x64_sys_ioctl+0x18e/0x210 do_syscall_64+0xcb/0xf80 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(&mm->mmap_lock); lock(&sb->s_type->i_mutex_key#8); lock(&mm->mmap_lock); rlock(&sb->s_type->i_mutex_key#8); *** DEADLOCK *** This seems to be exacerbated (as we haven't seen these syzbot reports before that) by the recent: 777a8560fd29 ("lib/buildid: use __kernel_read() for sleepable context") To make this safe, we need to grab file refcount while VMA is still locked, but other than that everything is pretty straightforward. Internal build_id_parse() API assumes VMA is passed, but it only needs the underlying file reference, so just add another variant build_id_parse_file() that expects file passed directly. [akpm@linux-foundation.org: fix up kerneldoc]

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/b9b97e6aeb534315f…
https://git.kernel.org/stable/c/cbc03ce3e6ce7e212…
https://git.kernel.org/stable/c/b5cbacd7f86f4f62b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ed5d583a88a9207b866c14ba834984c6f3c51d23 , < b9b97e6aeb534315f9646b2090d1a5024c6a4e82 (git) Affected: ed5d583a88a9207b866c14ba834984c6f3c51d23 , < cbc03ce3e6ce7e21214c3f02218213574c1a2d08 (git) Affected: ed5d583a88a9207b866c14ba834984c6f3c51d23 , < b5cbacd7f86f4f62b8813688c8e73be94e8e1951 (git)
Linux	Linux	Affected: 6.11 Unaffected: 0 , < 6.11 (semver) Unaffected: 6.12.70 , ≤ 6.12.* (semver) Unaffected: 6.18.10 , ≤ 6.18.* (semver) Unaffected: 6.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/proc/task_mmu.c",
            "include/linux/buildid.h",
            "lib/buildid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b9b97e6aeb534315f9646b2090d1a5024c6a4e82",
              "status": "affected",
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "versionType": "git"
            },
            {
              "lessThan": "cbc03ce3e6ce7e21214c3f02218213574c1a2d08",
              "status": "affected",
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "versionType": "git"
            },
            {
              "lessThan": "b5cbacd7f86f4f62b8813688c8e73be94e8e1951",
              "status": "affected",
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/proc/task_mmu.c",
            "include/linux/buildid.h",
            "lib/buildid.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.70",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.70",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.10",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.11",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: avoid fetching build ID while holding VMA lock\n\nFix PROCMAP_QUERY to fetch optional build ID only after dropping mmap_lock\nor per-VMA lock, whichever was used to lock VMA under question, to avoid\ndeadlock reported by syzbot:\n\n -\u003e #1 (\u0026mm-\u003emmap_lock){++++}-{4:4}:\n        __might_fault+0xed/0x170\n        _copy_to_iter+0x118/0x1720\n        copy_page_to_iter+0x12d/0x1e0\n        filemap_read+0x720/0x10a0\n        blkdev_read_iter+0x2b5/0x4e0\n        vfs_read+0x7f4/0xae0\n        ksys_read+0x12a/0x250\n        do_syscall_64+0xcb/0xf80\n        entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n -\u003e #0 (\u0026sb-\u003es_type-\u003ei_mutex_key#8){++++}-{4:4}:\n        __lock_acquire+0x1509/0x26d0\n        lock_acquire+0x185/0x340\n        down_read+0x98/0x490\n        blkdev_read_iter+0x2a7/0x4e0\n        __kernel_read+0x39a/0xa90\n        freader_fetch+0x1d5/0xa80\n        __build_id_parse.isra.0+0xea/0x6a0\n        do_procmap_query+0xd75/0x1050\n        procfs_procmap_ioctl+0x7a/0xb0\n        __x64_sys_ioctl+0x18e/0x210\n        do_syscall_64+0xcb/0xf80\n        entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n other info that might help us debug this:\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   rlock(\u0026mm-\u003emmap_lock);\n                                lock(\u0026sb-\u003es_type-\u003ei_mutex_key#8);\n                                lock(\u0026mm-\u003emmap_lock);\n   rlock(\u0026sb-\u003es_type-\u003ei_mutex_key#8);\n\n  *** DEADLOCK ***\n\nThis seems to be exacerbated (as we haven\u0027t seen these syzbot reports\nbefore that) by the recent:\n\n\t777a8560fd29 (\"lib/buildid: use __kernel_read() for sleepable context\")\n\nTo make this safe, we need to grab file refcount while VMA is still locked, but\nother than that everything is pretty straightforward. Internal build_id_parse()\nAPI assumes VMA is passed, but it only needs the underlying file reference, so\njust add another variant build_id_parse_file() that expects file passed\ndirectly.\n\n[akpm@linux-foundation.org: fix up kerneldoc]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:02:14.489Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b9b97e6aeb534315f9646b2090d1a5024c6a4e82"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbc03ce3e6ce7e21214c3f02218213574c1a2d08"
        },
        {
          "url": "https://git.kernel.org/stable/c/b5cbacd7f86f4f62b8813688c8e73be94e8e1951"
        }
      ],
      "title": "procfs: avoid fetching build ID while holding VMA lock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23199",
    "datePublished": "2026-02-14T16:27:24.326Z",
    "dateReserved": "2026-01-13T15:37:45.985Z",
    "dateUpdated": "2026-05-11T22:02:14.489Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

alsa-2026:49871

Vulnerability from osv_almalinux

CVE-2025-68214 (GCVE-0-2025-68214)

CVE-2026-23199 (GCVE-0-2026-23199)

Tags

Sightings

Nomenclature