CVE-2026-68157

Localized read selection can walk a parent bucket whose name exists in the CRUSH map while its type has no matching entry in typenames. getimmediateparent() then dereferences a NULL typecn 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 WARNONONCE ]

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68157.json",
    "cna_assigner": "Linux"
}

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type: GIT
Repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events: Introduced

117d96a04f007ce8fc2e292369056c3bd09f6f63

Fixed

c46d82c47afc968d6ee8ef4470fa2dd35b765c21

Fixed

3767c9f0c1bbd98dd25cb088356a0fc6c1f09f50

Fixed

4716a64b7cc2797741f7be4e283ace78a9dff37d

Fixed

db9cc9fd9660b2d69ee66f5a4cbec83c21a1c64d

Fixed

bbeae12fda3384a90fbebc8a19ba9d33f85b5361

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68157.json"

Linux / Kernel

Package

Name: Kernel

Affected ranges

Type: ECOSYSTEM
Events: Introduced

5.8.0

Fixed

6.6.148

Type: ECOSYSTEM
Events: Introduced

6.7.0

Fixed

6.12.101

Type: ECOSYSTEM
Events: Introduced

6.13.0

Fixed

6.18.42

Type: ECOSYSTEM
Events: Introduced

6.19.0

Fixed

7.1.6

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-68157.json"