CVE-2023-53622: gfs2: Fix possible data races in gfs2_show_options()

Severity: high (CVSS 7.0 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: 2025-10-07 · updated 2026-06-17
Weakness: CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix possible data races in gfs2_show_options() Some fields such as gt_logd_secs of the struct gfs2_tune are accessed without holding the lock gt_spin in gfs2_show_options(): val = sdp->sd_tune.gt_logd_secs; if (val != 30) seq_printf(s, ",commit=%d", val); And thus can cause data races when gfs2_show_options() and other functions such as gfs2_reconfigure() are concurrently executed: spin_lock(&gt->gt_spin); gt->gt_logd_secs = newargs->ar_commit; To fix these possible data races, the lock sdp->sd_tune.gt_spin is acquired before accessing the fields of gfs2_tune and released after these accesses. Further changes by Andreas: - Don't hold the spin lock over the seq_printf operations.

Affected products

Linux kernel: from 2.6.31 before 4.14.324; from 4.15 before 4.19.293; from 4.20 before 5.4.255; from 5.5 before 5.10.192; from 5.11 before 5.15.128; from 5.16 before 6.1.47 — fixed in 4.14.324, 4.19.293, 5.10.192, 5.15.128, 5.4.255, 6.1.47

How to fix

Upgrade to a fixed version: Linux kernel 4.14.324, 4.19.293, 5.10.192, 5.15.128. Check the vendor advisory for mitigations.

References

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