CVE-2024-56533
ALSA: usx2y: Use snd_card_free_when_closed() at disconnection
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Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: usx2y: 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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/24fe9f7ca83ec9acf765339054951f5cd9ae5c5d
- https://git.kernel.org/stable/c/7bd8838c0ea886679a32834fdcacab296d072fbe
- https://git.kernel.org/stable/c/befcca1777525e37c659b4129d8ac7463b07ef67
- https://git.kernel.org/stable/c/dafb28f02be407e07a6f679e922a626592b481b0
- https://git.kernel.org/stable/c/e07605d855c4104d981653146a330ea48f6266ed
References (9)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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