{"cve":"CVE-2026-68154","nvd":{"published":"2026-08-10T13:20:01.533","modified":"2026-10-19T21:17:55.340","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: reject zero bucket types in crush_decode\n\nCRUSH bucket type 0 is reserved for devices.  The mapper relies on\nthat invariant and uses type 0 to identify leaf devices.\n\nIf crush_decode() accepts a bucket with type 0, a malformed CRUSH map\ncan make the mapper treat a negative bucket ID as a device and pass it\nto is_out(), which then indexes the OSD weight array with a negative\nvalue.\n\nReject zero bucket types while decoding the CRUSH map so the invalid\nstate never reaches the mapper.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-20"],"references":["https://git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401","https://git.kernel.org/stable/c/146461f09565afe3665e65b0423d3d6b0fe806c5","https://git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56","https://git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081","https://git.kernel.org/stable/c/80fc40e11cda1b5d990a3f69c6efa344fb5cd987"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:56:58.798400159+00:00"},"epss":{"cve":"CVE-2026-68154","score":0.00714,"percentile":0.53395,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}