CVEvulnerability
CVE-2026-68154
9.8 CRITICAL
Official page ↗
- Status
- Received
- Published
- 2026-08-10
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-20
Description
In the Linux kernel, the following vulnerability has been resolved:
libceph: reject zero bucket types in crush_decode
CRUSH bucket type 0 is reserved for devices. The mapper relies on
that invariant and uses type 0 to identify leaf devices.
If crush_decode() accepts a bucket with type 0, a malformed CRUSH map
can make the mapper treat a negative bucket ID as a device and pass it
to is_out(), which then indexes the OSD weight array with a negative
value.
Reject zero bucket types while decoding the CRUSH map so the invalid
state never reaches the mapper.
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- https://git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401 git.kernel.org
- https://git.kernel.org/stable/c/146461f09565afe3665e65b0423d3d6b0fe806c5 git.kernel.org
- https://git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56 git.kernel.org
- https://git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081 git.kernel.org
- https://git.kernel.org/stable/c/80fc40e11cda1b5d990a3f69c6efa344fb5cd987 git.kernel.org
- https://git.kernel.org/stable/c/826cd1de5802fd392922785f9b64d76e65d2a100 git.kernel.org
- https://git.kernel.org/stable/c/952ca5dc99913d169263f59fd689f586729a13c1 git.kernel.org
- https://git.kernel.org/stable/c/b8a9fb6bf806f9c4891e71ae1beab0c07c23a877 git.kernel.org