CVE-2026-93056
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.
How to fix
- Linux Linux745adfe6c337f3d5d7737d57529d14a208151b45, 6351ba62778f72dc4f6bc18bfa99e618829cff0d, 021b58ac3e58cffa68ed9585ff492a19e98414f6, fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7, 8b9335aec93975bb9186d63993a5a610e5066ffc, 2ed25c9d4400cf90d9201657963a231c27a5ea57, 977659adb341f6e30fb00dcf183f63f29df879e2, 590d74ec8f488e06b9f1c0f8f0941f45531f3a55 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 745adfe6c337f3d5d7737d57529d14a208151b45, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 6351ba62778f72dc4f6bc18bfa99e618829cff0d, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 021b58ac3e58cffa68ed9585ff492a19e98414f6, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 8b9335aec93975bb9186d63993a5a610e5066ffc, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 2ed25c9d4400cf90d9201657963a231c27a5ea57, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 977659adb341f6e30fb00dcf183f63f29df879e2, 0854611a19ae4dfa56569e6f640017a1d2dd3312 ≤ v < 590d74ec8f488e06b9f1c0f8f0941f45531f3a55, 3.18 | 745adfe6c337f3d5d7737d57529d14a208151b45, 6351ba62778f72dc4f6bc18bfa99e618829cff0d, 021b58ac3e58cffa68ed9585ff492a19e98414f6, fd43eae7d539ea7cfc7c9f0d3f0eaa890415e8a7, 8b9335aec93975bb9186d63993a5a610e5066ffc, 2ed25c9d4400cf90d9201657963a231c27a5ea57, 977659adb341f6e30fb00dcf183f63f29df879e2, 590d74ec8f488e06b9f1c0f8f0941f45531f3a55 |
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