CVE-2026-93056
Published: September 19, 2026Last modified: October 6, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: remove broken string configfs attributes The UAC1_STR_ATTRIBUTE macro defines configfs show/store handlers for the fn_play, fn_cap, and fn_cntl string options. The store function contains an inverted null check on the kstrndup() return value. This means every write attempt returns -ENOMEM on success and dereferences a NULL pointer on allocation failure. The attributes have been broken and unused for many years. Remove the UAC1_STR_ATTRIBUTE macro and the three attributes it generated. The internal defaults (FILE_PCM_PLAYBACK, FILE_PCM_CAPTURE, FILE_CONTROL) set in f_audio_alloc_inst() are unaffected.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.189-r0) |
| 25 LTS | linux-lts | Fixed (6.12.111-r0) | |
| Stream | linux-lts | Fixed (6.18.53-r0) |
References
- https://git.kernel.org/stable/c/021b58ac3e58cffa68ed9585ff492a19e98414f6
- https://git.kernel.org/stable/c/2ed25c9d4400cf90d9201657963a231c27a5ea57
- https://git.kernel.org/stable/c/590d74ec8f488e06b9f1c0f8f0941f45531f3a55
- https://git.kernel.org/stable/c/6351ba62778f72dc4f6bc18bfa99e618829cff0d
- https://git.kernel.org/stable/c/745adfe6c337f3d5d7737d57529d14a208151b45
- https://git.kernel.org/stable/c/8b9335aec93975bb9186d63993a5a610e5066ffc
- https://git.kernel.org/stable/c/977659adb341f6e30fb00dcf183f63f29df879e2
- https://git.kernel.org/stable/c/fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7