CVE-2021-47509
ALSA: pcm: oss: Limit the period size to 16MB
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.12
References 8
git.kernel.org
- stable/c/d1bb703ad050de9095f10b2d3416c32921ac6bcc
- stable/c/b02a41eebcc36d4f07196780f2e165ca2c499257
- stable/c/be55f306396cd62c6889286a7194fd8b53363aeb
- stable/c/2e54cf6794bf82a54aaefc78da13819aea9cd28a
- stable/c/76f19e4cbb548e28547f8c328aa0bfb3a10222d3
- stable/c/ad45babf7886e7a212ee1d5eda9ef49f696db43c
- stable/c/35a3e511032146941085f87dd9fb5b82ea5c00a2
- stable/c/8839c8c0f77ab8fc0463f4ab8b37fca3f70677c2