CVE-2021-47509
ALSA: pcm: oss: Limit the period size to 16MB
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Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Limit the period size to 16MB Set the practical limit to the period size (the fragment shift in OSS) instead of a full 31bit; a too large value could lead to the exhaust of memory as we allocate temporary buffers of the period size, too. As of this patch, we set to 16MB limit, which should cover all use cases.
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/2e54cf6794bf82a54aaefc78da13819aea9cd28a
- https://git.kernel.org/stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2
- https://git.kernel.org/stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3
- https://git.kernel.org/stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2
- https://git.kernel.org/stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c
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
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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