Vulnerability-Lookup

GHSA-W765-6PJ3-4X6V

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-19 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: oss: Fix setup list UAF on proc write error

snd_pcm_oss_proc_write() links a newly allocated setup entry into the OSS setup list before duplicating the task name. If the task-name allocation fails, the error path frees the already linked entry and leaves setup_list pointing at freed memory.

A later OSS device open can then walk the stale list entry in snd_pcm_oss_look_for_setup() and dereference freed memory.

Allocate the task name and initialize the setup entry before publishing the entry on setup_list. Also fetch the initial proc read iterator only after taking setup_mutex, so all setup_list traversal follows the same list lifetime rules.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64001"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:39Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: oss: Fix setup list UAF on proc write error\n\nsnd_pcm_oss_proc_write() links a newly allocated setup entry into the\nOSS setup list before duplicating the task name. If the task-name\nallocation fails, the error path frees the already linked entry and\nleaves setup_list pointing at freed memory.\n\nA later OSS device open can then walk the stale list entry in\nsnd_pcm_oss_look_for_setup() and dereference freed memory.\n\nAllocate the task name and initialize the setup entry before publishing\nthe entry on setup_list. Also fetch the initial proc read iterator only\nafter taking setup_mutex, so all setup_list traversal follows the same\nlist lifetime rules.",
  "id": "GHSA-w765-6pj3-4x6v",
  "modified": "2026-07-19T18:31:49Z",
  "published": "2026-07-19T18:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64001"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64001 (GCVE-0-2026-64001)

Vulnerability from cvelistv5 – Published: 2026-07-19 14:56 – Updated: 2026-07-19 14:56

Title

ALSA: pcm: oss: Fix setup list UAF on proc write error

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix setup list UAF on proc write error snd_pcm_oss_proc_write() links a newly allocated setup entry into the OSS setup list before duplicating the task name. If the task-name allocation fails, the error path frees the already linked entry and leaves setup_list pointing at freed memory. A later OSS device open can then walk the stale list entry in snd_pcm_oss_look_for_setup() and dereference freed memory. Allocate the task name and initialize the setup entry before publishing the entry on setup_list. Also fetch the initial proc read iterator only after taking setup_mutex, so all setup_list traversal follows the same list lifetime rules.

Severity

No CVSS data available.

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/8be4efd0dc0093eb7…
https://git.kernel.org/stable/c/e13922bb97b4e6f94…
https://git.kernel.org/stable/c/be387230dc22d870a…
https://git.kernel.org/stable/c/4cc54bdd54b337e77…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 060d77b9c04acd7aef60790398a53f731db8c8fe , < 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce (git) Affected: 060d77b9c04acd7aef60790398a53f731db8c8fe , < e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c (git) Affected: 060d77b9c04acd7aef60790398a53f731db8c8fe , < be387230dc22d870afd0e5d35912b07c2bc323bd (git) Affected: 060d77b9c04acd7aef60790398a53f731db8c8fe , < 4cc54bdd54b337e77115be5b55577d1c58608eae (git)
Linux	Linux	Affected: 2.6.17 Unaffected: 0 , < 2.6.17 (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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        {
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          "programFiles": [
            "sound/core/oss/pcm_oss.c"
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          "vendor": "Linux",
          "versions": [
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    "datePublished": "2026-07-19T14:56:18.816Z",
    "dateReserved": "2026-07-19T07:54:57.026Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-W765-6PJ3-4X6V

CVE-2026-64001 (GCVE-0-2026-64001)

Tags

Sightings

Nomenclature