hwmon: (powerz) Fix missing usb_kill_urb() on signal interrupt

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Summary

CVECVE-2026-46073
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:28 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix missing usb_kill_urb() on signal interrupt wait_for_completion_interruptible_timeout() returns -ERESTARTSYS when interrupted. This needs to abort the URB and return an error. No data has been received from the device so any reads from the transfer buffer are invalid. The original code tests !ret, which only catches the timeout case (0). On signal delivery (-ERESTARTSYS), !ret is false so the function skips usb_kill_urb() and falls through to read from the unfilled transfer buffer. Fix by capturing the return value into a long (matching the function return type) and handling signal (negative) and timeout (zero) cases with separate checks that both call usb_kill_urb() before returning.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 8b51277eec433d4e724b273a5a5c64e8acfbe405 git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 b6cb07f02253bdefd2339e57eaa1428a7b28cd0f git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 d64458784036f5818e22781254b6be299d52a19c git Not specified
CNA Linux Linux affected 4381a36abdf1c5c0323c1c51f869dc000115eb20 b66437cb20a2d9ef201f40b675569f8ea7787c9f git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 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/b66437cb20a2d9ef201f40b675569f8ea7787c9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b6cb07f02253bdefd2339e57eaa1428a7b28cd0f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b51277eec433d4e724b273a5a5c64e8acfbe405 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d64458784036f5818e22781254b6be299d52a19c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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