CVE-2026-64001

Service interrupt via stale OSS setup entry

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in the ALSA PCM OSS layer allows local users to interrupt system availability through a later OSS device open. snd_pcm_oss_proc_write() links a setup entry before duplicating the task name, then frees that linked entry when allocation fails, leaving setup_list stale. Reachability requires that allocation failure followed by snd_pcm_oss_look_for_setup() traversing the list; no data disclosure or modification is reported.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the ALSA PCM OSS layer allows local users to interrupt system availability through a later OSS device open. snd_pcm_oss_proc_write() links a setup entry before duplicating the task name, then frees that linked entry when allocation fails, leaving setup_list stale. Reachability requires that allocation failure followed by snd_pcm_oss_look_for_setup() traversing the list; no data disclosure or modification is reported.

The record

CVE
CVE-2026-64001
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=060d77b9c04acd7aef60790398a53f731db8c8fe <4cc54bdd54b337e77115be5b55577d1c58608eae
  2. Affected versionversion=060d77b9c04acd7aef60790398a53f731db8c8fe <8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce
  3. Affected versionversion=060d77b9c04acd7aef60790398a53f731db8c8fe <be387230dc22d870afd0e5d35912b07c2bc323bd
  4. Affected versionversion=060d77b9c04acd7aef60790398a53f731db8c8fe <e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c
  5. Affected versionversion=2.6.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=060d77b9c04acd7aef60790398a53f731db8c8fe <4cc54bdd54b337e77115be5b55577d1c58608eae; version=060d77b9c04acd7aef60790398a53f731db8c8fe <8be4efd0dc0093eb7a02ad1aac936bca2a1f04ce; version=060d77b9c04acd7aef60790398a53f731db8c8fe <be387230dc22d870afd0e5d35912b07c2bc323bd; version=060d77b9c04acd7aef60790398a53f731db8c8fe <e13922bb97b4e6f94f8ac02d034f2d4bd65eeb3c; version=2.6.17

Published CVSS scores

5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.6TenableAV:L/AC:L/Au:N/C:P/I:N/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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