CVE-2026-46090

Advisory lineage Upstream: 0 Downstream: 38
Awaiting Analysis
Published: 27 May 2026, 12:58
Last modified:20 Jul 2026, 12:04

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.1% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 May 2026, 12:58
Published
Vulnerability first disclosed
20 Jul 2026, 12:04
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.10%• Percentile: 1%

Techniques & Countermeasures

  • CWE-364•Signal Handler Race Condition

    The product uses a signal handler that introduces a race condition.

Affected Systems

  • linux•linux

    ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < 83bd62fa9620ac98d5d694bde14c50f98c8e7189 | ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < 345c24b2bcf0923dfae1ab41497351c68214ff76 | ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < 03f52a9c170431e8f10e156b9dc0dae80b3e9198 | ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c | ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < 5d45e34bf001344e2966dabca1897561bbc9e913 | ≥ 597603d615d2b19a9e451d8cfac24372856a522d, < e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff | 2.6.37

References (23)