CVE-2025-40242

gfs2: Fix unlikely race in gdlm_put_lock

HIGH

CVSS Score

Published: December 4, 2025 at 03:31 PM UTC

Updated: October 19, 2026 at 07:10 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7

Exploit prediction

EPSS 0.1%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix unlikely race in gdlm_put_lock In gdlm_put_lock(), there is a small window of time in which the DFL_UNMOUNT flag has been set but the lockspace hasn't been released, yet. In that window, dlm may still call gdlm_ast() and gdlm_bast(). To prevent it from dereferencing freed glock objects, only free the glock if the lockspace has actually been released.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

01eb3106f43335fdc02111358dae80a5c3fd324d02e838963fdaa6ce8570b5389aecdc6cf1fb40b01eb3106f43335fdc2111358dae80a5c3fd324d2225a5cd2fbc2ef0e0f78e585db3844f60416a392e838963fdaa6ce8570b5389aecdc6cf1fb40b03554b46204e67333e1fb8be0e93936fb08267c804.14.247 4.19.207 4.4.284 4.9.283 5.10.67 5.13.19 5.14.6 5.15 5.4.1485cff77b9827a956d076168b56775aad23bce87e46aa628c45875e7b8cca81ed9447a12a0e8f3504a8deedce385d220f90e435f534d71d27526273515a97e75203733be0a4263a78fb7b29352be150c1cd1340f80f0b8066321b499a376780da00560e857

Vendor states this is fixed in 279bde3bbb0ac0bad5c729dfa85983d75a5d7641 (fixed)

Vendor states this is fixed in 28c4d9bc0708956c1a736a9e49fee71b65deee81 (fixed)

Vendor states this is fixed in 4913592a3358f6ec366b8346b733d5e2360b08e1 (fixed)

Vendor states this is fixed in 5fdc1474e678eea1700aa266c0b7c2c96f81dd0d (fixed)

Vendor states this is fixed in 64c61b4ac645222fa7b724cef616c1f862a72a40 (fixed)

Affected range stops below 4.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.15, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.20, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.11, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.14, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 5.15 (unaffected)

Affected range stops below 5.5, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 6.1.168 (unaffected)

Vendor states this is fixed in 6.12.56 (unaffected)

Vendor states this is fixed in 6.17.6 (unaffected)

Vendor states this is fixed in 6.18 (unaffected)

Vendor states this is fixed in 6.6.131 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: cverecord

https://git.kernel.org/stable/c/279bde3bbb0ac0bad5c729dfa85983d75a5d7641

Source: cverecord

https://git.kernel.org/stable/c/64c61b4ac645222fa7b724cef616c1f862a72a40

Source: cverecord

https://git.kernel.org/stable/c/28c4d9bc0708956c1a736a9e49fee71b65deee81

Source: cverecord

https://git.kernel.org/stable/c/4913592a3358f6ec366b8346b733d5e2360b08e1

Source: cverecord

https://git.kernel.org/stable/c/5fdc1474e678eea1700aa266c0b7c2c96f81dd0d

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGHLinux

Vector?

Quick Info

StatusDEFERRED

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