VulnerabilityPublished 19 Jul 2026Updated 21 Oct 2026

CVE-2026-64001: Linux kernel · ALSA: pcm: oss: Fix setup list UAF on proc write error

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c, d9df965284abde27ba6bfbdfc8407697cf6802f1, be387230dc22d870afd0e5d35912b07c2bc323bd +2

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 060d77b9c04acd7aef60790398a53f731db8c8fe, < e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c	Fixed in e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c
LinuxLinux	Affected ≥ 060d77b9c04acd7aef60790398a53f731db8c8fe, < d9df965284abde27ba6bfbdfc8407697cf6802f1	Fixed in d9df965284abde27ba6bfbdfc8407697cf6802f1
LinuxLinux	Affected ≥ 060d77b9c04acd7aef60790398a53f731db8c8fe, < be387230dc22d870afd0e5d35912b07c2bc323bd	Fixed in be387230dc22d870afd0e5d35912b07c2bc323bd
LinuxLinux	Affected ≥ 060d77b9c04acd7aef60790398a53f731db8c8fe, < 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce	Fixed in 8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce
LinuxLinux	Affected ≥ 060d77b9c04acd7aef60790398a53f731db8c8fe, < 4cc54bdd54b337e77115be5b55577d1c58608eae	Fixed in 4cc54bdd54b337e77115be5b55577d1c58608eae
LinuxLinux	Affected =2.6.17	Fixed in–

Description

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.

References

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