What’s Vulnerable › Vulnerabilities

CVE-2025-68284: libceph: prevent potential out-of-bounds writes in handle_auth_session_key()

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds writes in handle_auth_session_key() The len field originates from untrusted network packets. Boundary checks have been added to prevent potential out-of-bounds writes when decrypting the connection secret or processing service tickets. [ idryomov: changelog ]

Affected products

• Linux kernel: 5.11 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux kernel 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/5ef575834ca99f719d7573cdece9df2fe2b72424
• https://git.kernel.org/stable/c/6920ff09bf911bc919cd7a6b7176fbdd1a6e6850
• https://git.kernel.org/stable/c/7fce830ecd0a0256590ee37eb65a39cbad3d64fc
• https://git.kernel.org/stable/c/8dfcc56af28cffb8f25fb9be37b3acc61f2a3d09
• https://git.kernel.org/stable/c/ccbccfba25e9aa395daaea156b5e7790910054c4
• https://git.kernel.org/stable/c/f22c55a20a2d9ffbbac57408d5d488cef8201e9d

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