CVE-2024-56532

Summary

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

ALSA: us122l: Use snd_card_free_when_closed() at disconnection

The USB disconnect callback is supposed to be short and not too-long waiting. OTOH, the current code uses snd_card_free() at disconnection, but this waits for the close of all used fds, hence it can take long. It eventually blocks the upper layer USB ioctls, which may trigger a soft lockup.

An easy workaround is to replace snd_card_free() with snd_card_free_when_closed(). This variant returns immediately while the release of resources is done asynchronously by the card device release at the last close.

The loop of us122l->mmap_count check is dropped as well. The check is useless for the asynchronous operation with *_when_closed().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 020cbc4d7414f0962004213e2b7bc5cc607e9ec7affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 75f418b249d84021865eaa59515d3ed9b75ce4d6affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < bf0aa35a7cb8602cccf2387712114e836f65c154affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 9a48bd2184b142c92a4e17eac074c61fcf975bc9affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < bc778ad3e495333eebda36fe91d5b2c93109cc16affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 2938dd2648522336133c151dd67bb9bf01cbd390affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 9b27924dc8d7f8a8c35e521287d4ccb9a006e597affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < 9d5c530e4d70f64b1114f2cc29ac690ba7ac4a38affected
LinuxLinux030a07e441296c372f946cd4065b5d831d8dc40c < b7df09bb348016943f56b09dcaafe221e3f73947affected
LinuxLinux2.6.28affected
LinuxLinux0 < 2.6.28unaffected
LinuxLinux4.19.325 <= 4.19.*unaffected
LinuxLinux5.4.287 <= 5.4.*unaffected
LinuxLinux5.10.231 <= 5.10.*unaffected
LinuxLinux5.15.174 <= 5.15.*unaffected
LinuxLinux6.1.120 <= 6.1.*unaffected
LinuxLinux6.6.64 <= 6.6.*unaffected
LinuxLinux6.11.11 <= 6.11.*unaffected
LinuxLinux6.12.2 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References