CVE-2022-3303

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-09-27 · updated 2026-10-14
Weakness: CWE-667

Description

A race condition flaw was found in the Linux kernel sound subsystem due to improper locking. It could lead to a NULL pointer dereference while handling the SNDCTL_DSP_SYNC ioctl. A privileged local user (root or member of the audio group) could use this flaw to crash the system, resulting in a denial of service condition

Affected products

Debian Linux: 10.0, 11.0
Linux kernel: before 6.0; 6.0-rc1, 6.0-rc2, 6.0-rc3, 6.0-rc4 — fixed in 6.0

How to fix

Upgrade to a fixed version: Linux kernel 6.0. Check the vendor advisory for mitigations.

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8423f0b6d513b259fdab9c9bf4aaa6188d054c2d
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
https://lore.kernel.org/all/CAFcO6XN7JDM4xSXGhtusQfS2mSBcx50VJKwQpCq=WeLt57aaZA%40mail.gmail.com/
https://www.debian.org/security/2022/dsa-5257
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8423f0b6d513b259fdab9c9bf4aaa6188d054c2d
https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
https://lore.kernel.org/all/CAFcO6XN7JDM4xSXGhtusQfS2mSBcx50VJKwQpCq=WeLt57aaZA%40mail.gmail.com/
https://www.debian.org/security/2022/dsa-5257
https://cert-portal.siemens.com/productcert/html/ssa-794697.html

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