CVE-2026-68153

libceph: remove debugfs files before client teardown

State: Published
Severity: 7.8 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: 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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	76aa844d5b2fb8c839180d3f5874e333b297e5fd to before ac78549d186090ee7125d28c3a8c376573b36194Affected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before 463a264e9094384112a5c8b46f0a9ddaf8566904Affected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before fe46b7e06f14f6f94766832df309b249cb689d27Affected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before fc1010e7e0204ece6cc0f9af4f473e9553535eabAffected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before d3dc8889d39a676bf840132bd5c5c48cb0daba23Affected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before 8f5a3abc54ba24dbceb14cc3a719908c4f688091Affected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before b9fedda2f628e030384228de0dafc574b7fb0c2fAffected 76aa844d5b2fb8c839180d3f5874e333b297e5fd to before e4c804726c4afce3ba648b982d564f6af2cfa328Affected
LinuxLinux	2.6.34Affected before 2.6.34Not 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

76aa844d5b2fb8c839180d3f5874e333b297e5fd to before ac78549d186090ee7125d28c3a8c376573b36194Affected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before 463a264e9094384112a5c8b46f0a9ddaf8566904Affected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before fe46b7e06f14f6f94766832df309b249cb689d27Affected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before fc1010e7e0204ece6cc0f9af4f473e9553535eabAffected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before d3dc8889d39a676bf840132bd5c5c48cb0daba23Affected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before 8f5a3abc54ba24dbceb14cc3a719908c4f688091Affected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before b9fedda2f628e030384228de0dafc574b7fb0c2fAffected
76aa844d5b2fb8c839180d3f5874e333b297e5fd to before e4c804726c4afce3ba648b982d564f6af2cfa328Affected

LinuxLinux

2.6.34Affected
before 2.6.34Not 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

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