SB2026050990 - Improper input validation in Linux kernel ceph
Published: May 9, 2026
Security Bulletin ID
SB2026050990
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper input validation (CVE-ID: CVE-2026-43304)
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 update from vendor's website.
References
- 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