SB2026050250 - Use-after-free in Linux kernel core
Published: May 2, 2026
Security Bulletin ID
SB2026050250
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local 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-2026-43016)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in sk_psock_verdict_data_ready() when processing sendmsg operations on AF_UNIX sockets. A local user can send crafted messages through a socketpair to trigger the use-after-free and cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/18861f87a043e78b1f901cae4237e755ed7ef095
- https://git.kernel.org/stable/c/68187f18a89be4b6237d28ae1313b5adf76238c6
- https://git.kernel.org/stable/c/8d597e3e74027900ffa81b8ff47ab51999a3e110
- https://git.kernel.org/stable/c/ad8391d37f334ee73ba91926f8b4e4cf6d31ea04
- https://git.kernel.org/stable/c/af95bc39a83d82ae6ad253986335037256888b3f