What’s Vulnerable › Vulnerabilities

CVE-2026-68153: libceph: remove debugfs files before client teardown

• Severity: high (CVSS 7.8 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: 2026-08-10 · updated 2026-10-19
• Weakness: CWE-416

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.

Affected products

• Linux kernel: 2.6.34 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/463a264e9094384112a5c8b46f0a9ddaf8566904
• https://git.kernel.org/stable/c/8f5a3abc54ba24dbceb14cc3a719908c4f688091
• https://git.kernel.org/stable/c/ac78549d186090ee7125d28c3a8c376573b36194
• https://git.kernel.org/stable/c/b9fedda2f628e030384228de0dafc574b7fb0c2f
• https://git.kernel.org/stable/c/d3dc8889d39a676bf840132bd5c5c48cb0daba23
• https://git.kernel.org/stable/c/e4c804726c4afce3ba648b982d564f6af2cfa328
• https://git.kernel.org/stable/c/fc1010e7e0204ece6cc0f9af4f473e9553535eab
• https://git.kernel.org/stable/c/fe46b7e06f14f6f94766832df309b249cb689d27

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