CVE-2026-43419: ceph: fix memory leaks in ceph_mdsc_build_path()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-08 · updated 2026-10-30
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: fix memory leaks in ceph_mdsc_build_path() Add __putname() calls to error code paths that did not free the "path" pointer obtained by __getname(). If ownership of this pointer is not passed to the caller via path_info.path, the function must free it before returning.

Affected products

Linux kernel: from 5.10.234 before 5.11; from 5.15.177 before 5.16; from 6.1.125 before 6.2; from 6.6 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.19 — fixed in 5.11, 5.16, 6.2, 6.6.130, 6.12.78, 6.18.19
Linux: from 6.1.125 before 6.1.191; from 5.10.234 before 5.11; from 5.15.177 before 5.16 — fixed in 6.1.191, 5.11, 5.16

How to fix

Upgrade to a fixed version: Linux kernel 5.11, 5.16, 6.2, 6.6.130; Linux 6.1.191, 5.11, 5.16. Check the vendor advisory for mitigations.

References

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