CVE-2022-49288
ALSA: pcm: Fix races among concurrent prealloc proc writes
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Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Fix races among concurrent prealloc proc writes We have no protection against concurrent PCM buffer preallocation changes via proc files, and it may potentially lead to UAF or some weird problem. This patch applies the PCM open_mutex to the proc write operation for avoiding the racy proc writes and the PCM stream open (and further operations).
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/37b12c16beb6f6c1c3c678c1aacbc46525c250f7
- https://git.kernel.org/stable/c/51fce708ab8986a9879ee5da946a2cc120f1036d
- https://git.kernel.org/stable/c/5ed8f8e3c4e59d0396b9ccf2e639711e24295bb6
- https://git.kernel.org/stable/c/69534c48ba8ce552ce383b3dfdb271ffe51820c3
- https://git.kernel.org/stable/c/a21d2f323b5a978dedf9ff1d50f101f85e39b3f2
References (8)
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
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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