CVE-2026-68154libceph: reject zero bucket types in crush_decode
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 952ca5dc99913d169263f59fd689f586729a13c1; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 146461f09565afe3665e65b0423d3d6b0fe806c5; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 80fc40e11cda1b5d990a3f69c6efa344fb5cd987; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before b8a9fb6bf806f9c4891e71ae1beab0c07c23a877; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 826cd1de5802fd392922785f9b64d76e65d2a100; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 70998f91030ee083ecb336a1dff0701c20a38081; from f24e9980eb860d8600cbe5ef3d2fd9295320d229 before 05f90284223381005d6bcddab3fda4a97f9c3401 | CNA record |
References
- https://git.kernel.org/stable/c/952ca5dc99913d169263f59fd689f586729a13c1
- https://git.kernel.org/stable/c/146461f09565afe3665e65b0423d3d6b0fe806c5
- https://git.kernel.org/stable/c/80fc40e11cda1b5d990a3f69c6efa344fb5cd987
- https://git.kernel.org/stable/c/b8a9fb6bf806f9c4891e71ae1beab0c07c23a877
- https://git.kernel.org/stable/c/826cd1de5802fd392922785f9b64d76e65d2a100
- https://git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56
- https://git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081
- https://git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.