libceph: reject zero bucket types in crush_decode

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-68154
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-10 13:20:01 UTC
Updated2026-08-19 17:20:32 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.006260000 probability, percentile 0.473100000 (date 2026-08-19)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 952ca5dc99913d169263f59fd689f586729a13c1 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 146461f09565afe3665e65b0423d3d6b0fe806c5 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 80fc40e11cda1b5d990a3f69c6efa344fb5cd987 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 b8a9fb6bf806f9c4891e71ae1beab0c07c23a877 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 826cd1de5802fd392922785f9b64d76e65d2a100 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 70998f91030ee083ecb336a1dff0701c20a38081 git Not specified
CNA Linux Linux affected f24e9980eb860d8600cbe5ef3d2fd9295320d229 05f90284223381005d6bcddab3fda4a97f9c3401 git Not specified
CNA Linux Linux affected 2.6.34 Not specified
CNA Linux Linux unaffected 2.6.34 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.101 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.42 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.6 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/80fc40e11cda1b5d990a3f69c6efa344fb5cd987 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/70998f91030ee083ecb336a1dff0701c20a38081 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/826cd1de5802fd392922785f9b64d76e65d2a100 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3b2f1937f5fce8b7dd5432e7693e3cc8b5eece56 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/146461f09565afe3665e65b0423d3d6b0fe806c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/952ca5dc99913d169263f59fd689f586729a13c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b8a9fb6bf806f9c4891e71ae1beab0c07c23a877 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/05f90284223381005d6bcddab3fda4a97f9c3401 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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