Vulnerability details
CVE-2026-46090
Linux LinuxRed Hat Enterprise Linux 9
ALSA: aloop: Fix peer runtime UAF during format-change stop
CVSS 3.1
7.8High
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 7.0High | 3.1 | CVEProject cvelistV5 (CNA) (redhat-SADP) | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 2.6.37 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < 345c24b2bcf0923dfae1ab41497351c68214ff76 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < 3727a3541788412c393eec236ad228d72efe19c7 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < d258cdce50ff3e02392917258e81a0ce9555c327 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < 03f52a9c170431e8f10e156b9dc0dae80b3e9198 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < 5d45e34bf001344e2966dabca1897561bbc9e913 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 597603d615d2b19a9e451d8cfac24372856a522d ≤ v < 83bd62fa9620ac98d5d694bde14c50f98c8e7189 | CVEProject cvelistV5 (CNA) |
| Red Hat | Red Hat Enterprise Linux 9 | All | CVEProject cvelistV5 (CNA) |
References and advisories
25- https://git.kernel.org/stable/c/83bd62fa9620ac98d5d694bde14c50f98c8e7189
- https://git.kernel.org/stable/c/345c24b2bcf0923dfae1ab41497351c68214ff76
- https://git.kernel.org/stable/c/3727a3541788412c393eec236ad228d72efe19c7
- https://git.kernel.org/stable/c/d258cdce50ff3e02392917258e81a0ce9555c327
- https://git.kernel.org/stable/c/03f52a9c170431e8f10e156b9dc0dae80b3e9198
- https://git.kernel.org/stable/c/bdd9503c3d222d2735b56c7a8b4422ccf3de6e5c
- https://git.kernel.org/stable/c/5d45e34bf001344e2966dabca1897561bbc9e913
- https://git.kernel.org/stable/c/e5c33cdc6f402eab8abd36ecf436b22c9d3a8aff
- https://access.redhat.com/security/cve/CVE-2026-46090 vdb-entryx_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2481980 issue-trackingx_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46090.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:35844 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:41236 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33215 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33685 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34095 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34443 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:34094 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:30848 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27353 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:35896 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33899 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:35863 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:27354 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:33900 vendor-advisoryx_refsource_REDHAT
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Details
- Published
- 2026-05-27
- Last updated
- 2026-10-19
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.1%
Probability of exploitation in 30 days
0.9%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-364Signal Handler Race Condition
- CWE-416Use After Free