CVE-2026-68154 (GCVE-0-2026-68154)
Vulnerability from cvelistv5
Published
2026-08-10 11:59
Modified
2026-10-19 20:58
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
Version: f24e9980eb860d8600cbe5ef3d2fd9295320d229
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