ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES

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Summary

CVECVE-2026-46018
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:20 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: stop parsing UAC2 rates at MAX_NR_RATES parse_uac2_sample_rate_range() caps the number of enumerated rates at MAX_NR_RATES, but it only breaks out of the current rate loop. A malformed UAC2 RANGE response with additional triplets continues parsing the remaining triplets and repeatedly prints "invalid uac2 rates" while probe still holds register_mutex. Stop the whole parse once the cap is reached and return the number of rates collected so far.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4fa0e81b83503900be277e6273a79651b375e288 ab5ba9fd138758ddc50222264ff246b31e397abf git Not specified
CNA Linux Linux affected 4fa0e81b83503900be277e6273a79651b375e288 ba036305323814ec1f8655313b2fa6a0f7048716 git Not specified
CNA Linux Linux affected 4fa0e81b83503900be277e6273a79651b375e288 4d7893a137eadb6163ea4298bf67d74b811d76ef git Not specified
CNA Linux Linux affected 4fa0e81b83503900be277e6273a79651b375e288 a0b78639ef09b2e77974a3de3b1c07f6de3c5e56 git Not specified
CNA Linux Linux affected 4fa0e81b83503900be277e6273a79651b375e288 3c318f97dcc50b2e0556a1813bd6958678e881fd git Not specified
CNA Linux Linux affected 44f059fb742aac78cffdab5e0d8fe0c9910c1ded git Not specified
CNA Linux Linux affected c25a53781f61c78bf2a2fa308bbd35b42ba346f6 git Not specified
CNA Linux Linux affected 3.0.81 3.1 semver Not specified
CNA Linux Linux affected 3.2.47 3.3 semver Not specified
CNA Linux Linux affected 3.3 Not specified
CNA Linux Linux unaffected 3.3 semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ba036305323814ec1f8655313b2fa6a0f7048716 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4d7893a137eadb6163ea4298bf67d74b811d76ef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3c318f97dcc50b2e0556a1813bd6958678e881fd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a0b78639ef09b2e77974a3de3b1c07f6de3c5e56 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ab5ba9fd138758ddc50222264ff246b31e397abf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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