SB20260625237 - 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-2026-52956)

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

CVSSv4: 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

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in __ceph_x_decrypt() when processing a crafted Ceph authentication reply message. A remote attacker can send a specially crafted message frame to cause a denial of service.

The issue can be triggered when the ciphertext is too short to contain a ceph_x_encrypt_header, such as in a FRAME_TAG_AUTH_REPLY_MORE message.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/821365487aa58d06bda65c676ba215d506ba9768
• https://git.kernel.org/stable/c/c7e9b53aebe401970f1b5f5a01b4e021b18e8bb2