SB2026052793 - Use-after-free in Linux kernel caif
Published: May 27, 2026
Security Bulletin ID
SB2026052793
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-46098)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a use-after-free in the caif client teardown logic when handling remote shutdown and subsequent socket destruction. A remote attacker can trigger repeated teardown to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3ac6db584d9d420267bb8413115707eeec76d9cf
- https://git.kernel.org/stable/c/63d21a3aa0108b9dde4e99b0d3d5d679ac68c0f9
- https://git.kernel.org/stable/c/914c6456fcfc21a3d553945dff62fd1621d6155d
- https://git.kernel.org/stable/c/a4b191ddc12c55ddb62feb096536f819f384d6f1
- https://git.kernel.org/stable/c/f7cf8ece8cee3c1ee361991470cdb1eb65ab02e8