CVE-2026-74497

Summary

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: Clamp frame size in implicit-feedback mode

snd_usb_handle_sync_urb() scales received sync packet sizes by the sender's stride and stores the result directly in out_packet->packet_size[i]. If a connected USB device sends an oversized sync packet, this frame count can exceed ep->maxframesize.

The un-clamped frame count then propagates to the playback endpoint queue, potentially driving packet transfers beyond the endpoint's hardware frame limits.

Cap the calculated frame count against ep->maxframesize in snd_usb_handle_sync_urb() to prevent oversized packets from entering the playback queue.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 56ac3e7c90f6b45969c3fd07a98fad760ffd6901affected
LinuxLinux28acb12014fb0c3e1edfdab1b1e3e266cf651550 < be97fea7451d758881b95af78e900dd0d58a382aaffected
LinuxLinux28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 2db4535d6af79276a64449201c5be5feffb31c64affected
LinuxLinux28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 53f0aa37eb945f3c983f61d12fc35eb33debb8a9affected
LinuxLinux28acb12014fb0c3e1edfdab1b1e3e266cf651550 < 8d7a30c50c2e58a6839634ed0acde14466d1dc61affected
LinuxLinux3.8affected
LinuxLinux0 < 3.8unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References