🛡️ CVE-2026-46090 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ALSA: aloop: Fix peer runtime UAF during format-change stop

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

ALSA: aloop: Fix peer runtime UAF during format-change stop

loopback_check_format() may stop the capture side when playback starts

with parameters that no longer match a running capture stream. Commit

826af7fa62e3 ("ALSA: aloop: Fix racy access at PCM trigger") moved

the peer lookup under cable->lock, but the actual snd_pcm_stop() still

runs after dropping that lock.

A concurrent close can clear the capture entry from cable->streams[] and

detach or free its runtime while the playback trigger path still holds a

stale peer substream pointer.

Keep a per-cable count of in-flight peer stops before dropping

cable->lock, and make free_cable() wait for those stops before

detaching the runtime. This preserves the existing behavior while

making the peer runtime lifetime explicit.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2026-46090 is recorded against 3 packages.

  • kernel (from 6.19.0 up to 7.0.4)
  • linux-kernel
  • unknown

Timeline and source

Published on 27 May 2026 and last revised on 6 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
security.access.redhat.com (Web)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)
access.redhat.com (Advisory)

CVE-2026-46090 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-12
Modified 2026-08-06

Affected Packages

Software From version Fixed in
kernel 6.19.0 7.0.4
linux-kernel — —
unknown — —

References

Similar Threats

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