CVE-2026-68157

libceph: guard missing CRUSH type name lookup

State: Published
Severity: 7.5 High
Published: Aug 10, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

libceph: guard missing CRUSH type name lookup

Localized read selection can walk a parent bucket whose name exists in the CRUSH map while its type has no matching entry in type_names. get_immediate_parent() then dereferences a NULL type_cn and passes an invalid pointer into strcmp(), causing a null-ptr-deref.

Skip such malformed parent buckets unless both the bucket name and type name metadata are present. This keeps malformed hierarchy data from crashing locality lookup and safely falls back to "not local".

[ idryomov: add WARN_ON_ONCE ]

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	117d96a04f007ce8fc2e292369056c3bd09f6f63 to before cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0Affected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 8ff579ac03d6e9d17d6d9c8443110167c14a382dAffected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 6a4b75d90f0cfbf22c14742ab35a803bc13f36ecAffected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before c46d82c47afc968d6ee8ef4470fa2dd35b765c21Affected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50Affected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 4716a64b7cc2797741f7be4e283ace78a9dff37dAffected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64dAffected 117d96a04f007ce8fc2e292369056c3bd09f6f63 to before bbeae12fda3384a90fbebc8a19ba9d33f85b5361Affected
LinuxLinux	5.8Affected before 5.8Not affected 5.10.265 through 5.10.Not affected 5.15.216 through 5.15.Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

117d96a04f007ce8fc2e292369056c3bd09f6f63 to before cbfcba275326c8c7dae9acd8f4a0d4c316fdafb0Affected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 8ff579ac03d6e9d17d6d9c8443110167c14a382dAffected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 6a4b75d90f0cfbf22c14742ab35a803bc13f36ecAffected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before c46d82c47afc968d6ee8ef4470fa2dd35b765c21Affected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50Affected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before 4716a64b7cc2797741f7be4e283ace78a9dff37dAffected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64dAffected
117d96a04f007ce8fc2e292369056c3bd09f6f63 to before bbeae12fda3384a90fbebc8a19ba9d33f85b5361Affected

LinuxLinux

5.8Affected
before 5.8Not affected
5.10.265 through 5.10.*Not affected
5.15.216 through 5.15.*Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.