Improper input validation in Linux kernel - CVE-2026-43030
Published: May 2, 2026
Vulnerability identifier: #VU128884
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-2026-43030
CWE-ID: CWE-20
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 state validation in regsafe() when verifying pointers to packet. A local user can load a specially crafted bpf program to cause a denial of service.
How to mitigate CVE-2026-43030
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185
- https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968
- https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370
- https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996
- https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225
- https://git.kernel.org/stable/c/b52f6d0ef7b308f9d05bbddb78749852f28e8e40
- https://git.kernel.org/stable/c/b99d82706bd1511bb875e3de7154698fd9215c99
- https://git.kernel.org/stable/c/ca995b1462ec6db1e869100ba1fb7356bd3f22f0