SB2026081312 - Out-of-bounds read in Linux kernel ceph

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-68082)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in decode_lockers() in net/ceph/cls_lock_client.c when parsing OSD-supplied lock information. A remote user can send a specially crafted OSD reply to disclose sensitive information.

Exploitation requires control of a malicious or compromised OSD and can be triggered against kernel clients that issue the lock.get_info class method, such as during RBD exclusive lock acquisition in a multi-tenant Ceph deployment.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/a109a556115271ca7896dcda7b4b7e45e156c227
• https://git.kernel.org/stable/c/a54be593d0b749161b08a1e56189b2cb9114267a