CVE-2025-68283
kernel: libceph: replace BUG_ON with bounds check for map->max_osd
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · December 16, 2025
Updated · July 30, 2026
Description
A flaw was found in the libceph module of the Linux kernel. OSD index values received from network packets were not properly validated against map->max_osd before use, with only a BUG_ON assertion as protection. A malicious or compromised Ceph cluster could send out-of-bounds OSD indexes, potentially causing kernel crashes or memory corruption.
Statement
Exploitation requires network access to a system with mounted CephFS or RBD devices, and a compromised or malicious Ceph cluster to send crafted packets with invalid OSD indexes.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-1285 · Improper Validation of Specified Index, Position, or Offset in Input