CVE-2021-47511
ALSA: pcm: oss: Fix negative period/buffer sizes
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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: Fix negative period/buffer sizes The period size calculation in OSS layer may receive a negative value as an error, but the code there assumes only the positive values and handle them with size_t. Due to that, a too big value may be passed to the lower layers. This patch changes the code to handle with ssize_t and adds the proper error checks appropriately.
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/be8869d388593e57223ad39297c8e54be632f2f2
- stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0c
- stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1b
- stable/c/f96c0959c1ee92adc911c10d6ec209af50105049
- stable/c/f12c8a7515f641885677960af450082569a87243
- stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823
- stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc
- stable/c/9d2479c960875ca1239bcb899f386970c13d9cfe