Description
In the Linux kernel, the following vulnerability has been resolved: libceph: remove debugfs files before client teardown ceph_destroy_client() tears down the monitor client before removing the per-client debugfs files. A concurrent read of the monmap debugfs file can enter monmap_show() after ceph_monc_stop() has freed monc->monmap, triggering a use-after-free. Remove the debugfs files before stopping the OSD and monitor clients. debugfs_remove() drains active handlers and prevents new accesses, so the debugfs callbacks can no longer race the rest of client teardown.
References8
- git.kernel.org/stable/c/463a264e9094384112a5c8b46f0a9ddaf8566904
- git.kernel.org/stable/c/8f5a3abc54ba24dbceb14cc3a719908c4f688091
- git.kernel.org/stable/c/ac78549d186090ee7125d28c3a8c376573b36194
- git.kernel.org/stable/c/b9fedda2f628e030384228de0dafc574b7fb0c2f
- git.kernel.org/stable/c/d3dc8889d39a676bf840132bd5c5c48cb0daba23
- git.kernel.org/stable/c/e4c804726c4afce3ba648b982d564f6af2cfa328
- git.kernel.org/stable/c/fc1010e7e0204ece6cc0f9af4f473e9553535eab
- git.kernel.org/stable/c/fe46b7e06f14f6f94766832df309b249cb689d27
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 12 November 2026
- CWE
- CWE-416
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