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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64001
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:39 UTC
Updated2026-07-19 16:17:39 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.063760000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 060d77b9c04acd7aef60790398a53f731db8c8fe 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce git Not specified
CNA Linux Linux affected 060d77b9c04acd7aef60790398a53f731db8c8fe e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c git Not specified
CNA Linux Linux affected 060d77b9c04acd7aef60790398a53f731db8c8fe be387230dc22d870afd0e5d35912b07c2bc323bd git Not specified
CNA Linux Linux affected 060d77b9c04acd7aef60790398a53f731db8c8fe 4cc54bdd54b337e77115be5b55577d1c58608eae git Not specified
CNA Linux Linux affected 2.6.17 Not specified
CNA Linux Linux unaffected 2.6.17 semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/be387230dc22d870afd0e5d35912b07c2bc323bd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4cc54bdd54b337e77115be5b55577d1c58608eae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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