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CVE-2026-46090
ALSA: aloop: Fix peer runtime UAF during format-change stop
High7.8EPSS 0.10%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| redhat-SADPADP (enrichment) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.10% · top 99% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < 83bd62fa9620ac98d5d694bde14c50f98c8e7189
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < 345c24b2bcf0923dfae1ab41497351c68214ff76
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < 3727a3541788412c393eec236ad228d72efe19c7
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < d258cdce50ff3e02392917258e81a0ce9555c327
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < 03f52a9c170431e8f10e156b9dc0dae80b3e9198
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < 5d45e34bf001344e2966dabca1897561bbc9e913
- affected 597603d615d2b19a9e451d8cfac24372856a522d – < e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff
- affected 2.6.37
- unaffected < 2.6.37
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.27 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References (25)
- https://git.kernel.org/stable/c/83bd62fa9620ac98d5d694bde14c50f98c8e7189 (opens in a new tab)
- https://git.kernel.org/stable/c/345c24b2bcf0923dfae1ab41497351c68214ff76 (opens in a new tab)
- https://git.kernel.org/stable/c/3727a3541788412c393eec236ad228d72efe19c7 (opens in a new tab)
- https://git.kernel.org/stable/c/d258cdce50ff3e02392917258e81a0ce9555c327 (opens in a new tab)
- https://git.kernel.org/stable/c/03f52a9c170431e8f10e156b9dc0dae80b3e9198 (opens in a new tab)
- https://git.kernel.org/stable/c/bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c (opens in a new tab)
- https://git.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913 (opens in a new tab)
- https://git.kernel.org/stable/c/e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff (opens in a new tab)
- https://access.redhat.com/security/cve/CVE-2026-46090 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2481980 (opens in a new tab)issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46090.json (opens in a new tab)x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:35844 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:41236 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33215 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33685 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34095 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34443 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34094 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30848 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27353 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:35896 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33899 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:35863 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27354 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33900 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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