What’s Vulnerable › Vulnerabilities

CVE-2025-68283: libceph: replace BUG_ON with bounds check for map->max_osd

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% 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: replace BUG_ON with bounds check for map->max_osd OSD indexes come from untrusted network packets. Boundary checks are added to validate these against map->max_osd. [ idryomov: drop BUG_ON in ceph_get_primary_affinity(), minor cosmetic edits ]

Affected products

• Linux kernel: 2.6.34 — 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/57f5fbae9f1024aba17ff75e00433324115c548a
• https://git.kernel.org/stable/c/b4368b7f97014e1015445d61abd0b27c4c6e8424
• https://git.kernel.org/stable/c/becc488a4d864db338ebd4e313aa3c77da24b604
• https://git.kernel.org/stable/c/e67e3be690f5f7e3b031cf29e8d91e6d02a8e30d
• https://git.kernel.org/stable/c/ec3797f043756a94ea2d0f106022e14ac4946c02

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