Use-after-free in Linux kernel - CVE-2026-43016
Published: May 2, 2026
Vulnerability identifier: #VU128899
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-43016
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-43016
Install security update from vendor's repository.
Sources
- 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