CVE-2026-23191
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ALSA: aloop: Fix racy access at PCM trigger
In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Fix racy access at PCM trigger The PCM trigger callback of aloop driver tries to check the PCM state and stop the stream of the tied substream in the corresponding cable. Since both check and stop operations are performed outside the cable lock, this may result in UAF when a program attempts to trigger frequently while opening/closing the tied stream, as spotted by fuzzers. For addressing the UAF, this patch changes two things: - It covers the most of code in loopback_check_format() with cable->lock spinlock, and add the proper NULL checks. This avoids already some racy accesses. - In addition, now we try to check the state of the capture PCM stream that may be stopped in this function, which was the major pain point leading to UAF.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | f57467114f40c5aacebbea96fb4ff9e5cd2b7f18 | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | c99be0d5af02adebe9cb6f9869d20397fa9935a3 | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | f3ce8be893726899e3053cf8059ecc95d8410359 | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | 0e6245b2424d126ac90018142d09f0707e12998b | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | bad15420050db1803767e58756114800cce91ea4 | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | 5727ccf9d19ca414cb76d9b647883822e2789c2e | Unavailable | None listed |
| b1c73fc8e697eb73e23603e465e9af2711ed4183 | affected | git | 826af7fa62e347464b1b4e0ba2fe19a92438084f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.37 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.37 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.70 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.10 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19 | unaffected | original_commit_for_fix | Unavailable | * | None listed |