Improper input validation in Linux kernel - CVE-2026-43304
Published: May 9, 2026
Vulnerability identifier: #VU130882
CSH Severity: Medium
CVSSv4.0: 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
CVE-ID: CVE-2026-43304
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in process_auth_done() when decoding ceph authentication keys. A remote attacker can send a crafted key with excessive key material to cause a denial of service.
Remediation
Install security update from vendor's repository.
External links
- https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64
- https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6
- https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244
- https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf
- https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed
- https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb
- https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16