Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-43114
Published: May 7, 2026
Vulnerability identifier: #VU130641
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-2026-43114
CWE-ID: CWE-670
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 improper handling of stale bits in nft_set_pipapo_avx2 match functions in the netfilter pipapo set implementation when processing crafted set elements during avx2-based matching. A local user can load and reload a crafted pipapo set to cause a denial of service.
The issue occurs with avx2 matching functions and can cause a non-matching expired entry to be treated as a match after a set flush and reload operation.
How to mitigate CVE-2026-43114
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/07de44424bb7f17ef9357e8535df96d9e97c40cb
- https://git.kernel.org/stable/c/0abbc43f71d99baadeeba6fa3fe1c80b676f57ed
- https://git.kernel.org/stable/c/3d53f9aafd469ae1ea27051e00f5b96ca1b55d52
- https://git.kernel.org/stable/c/d3c0037ffe1273fa1961e779ff6906234d6cf53c
- https://git.kernel.org/stable/c/fa4f1f52528c73989d820f32bfca06bec5afeece