VULNERABILITY INTELLIGENCE
CVE-2026-68154
CVSS score9.8 CRITICAL
EPSS probability0.71%
CISA KEVNot currently listed
Published2026-08-10
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-20