ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3()

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Avoid potential endless loop in convert_chmap_v3() The convert_chmap_v3() has a loop with its increment size of cs_desc->wLength, but we forgot to validate cs_desc->wLength itself, which may lead to potential endless loop by a malformed descriptor. Add a proper size check to abort the loop for plugging the hole.

Timeline

1. May 28, 2026, 9:36 AM UTCCVE published
2. Oct 15, 2026, 1:20 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 786571b10b1ae6d90e1242848ce78ee7e1d493c4 · fixed in 076d5d13eb9c1ad259a7f246149f6676c62285f9; From 275e37532e8ebe25e8a4069b2d9f955bfd202a46 · fixed in 316aa0b1e3c5600eae5ab876394c1ac70e6db581; From 47ab3d820cb0a502bd0074f83bb3cf7ab5d79902 · fixed in 24a40df79307ca7ca0eec0889361cf6ac146d72a; From 1034719fdefd26caeec0a44a868bb5a412c2c1a5 · fixed in e0e3dcf48189603f3865f1a0b799b3b42baae96d; From ae17b3b5e753efc239421d186cd1ff06e5ac296e · fixed in 4e0ee232ebe3df04874125d7c7f3e6c25ea5483d; From ecfd41166b72b67d3bdeb88d224ff445f6163869 · fixed in be09b47ed8677d76962e3240c145502e2ad9f3c8; From ecfd41166b72b67d3bdeb88d224ff445f6163869 · fixed in fa5b19ce69067874b1413f3c2027563bae8c2cb3; From ecfd41166b72b67d3bdeb88d224ff445f6163869 · fixed in 6e7247d8f5fefeceb0bb9cc80a5388a636b219cd; From 5.10.241 · fixed in 5.10.258; From 5.15.190 · fixed in 5.15.209; From 6.1.149 · fixed in 6.1.175; From 6.6.103 · fixed in 6.6.140; From 6.12.43 · fixed in 6.12.88; From 5.4.297 · fixed in 5.5; From 6.15.11 · fixed in 6.16; From 6.16.2 · fixed in 6.17

• Linux Linux

  6.17

• KernelLinux

  fixed in 5.10.258; From 5.11.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.140; From 6.7.0 · fixed in 6.12.88; From 6.13.0 · fixed in 6.18.30; From 6.17.0 · fixed in 7.0.7

References 8