7

CVE-2025-40242: gfs2: Fix unlikely race in gdlm_put_lock

Deferred
AliasesUBUNTU-CVE-2025-40242DEBIAN-CVE-2025-40242
Published 04-12-2025Last modified 15-10-2026

Vulnerability summary

CVE-2025-40242 is a high (CVSS 7.0) vulnerability in linux. EPSS estimates a 0.14% chance of exploitation in the next 30 days, higher than 3.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.14%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 35 · Related 33
OPENSUSE-SU-2026:20145-1RHSA-2026:75746RHSA-2026:75747SUSE-SU-2026:0278-1SUSE-SU-2026:0281-1SUSE-SU-2026:0293-1

Timeline

  1. 04-12-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.14%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.14% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu154 products
  • linuxAll versions (No fix recorded) | < 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.170-1 | < 6.12.57-1 | < 6.17.6-1
Linux1 product
  • linux≥ d1340f80f0b8066321b499a376780da00560e857, < 5fdc1474e678eea1700aa266c0b7c2c96f81dd0d | ≥ d1340f80f0b8066321b499a376780da00560e857, < 4913592a3358f6ec366b8346b733d5e2360b08e1 | ≥ d1340f80f0b8066321b499a376780da00560e857, < 279bde3bbb0ac0bad5c729dfa85983d75a5d7641 | ≥ d1340f80f0b8066321b499a376780da00560e857, < 64c61b4ac645222fa7b724cef616c1f862a72a40 | ≥ d1340f80f0b8066321b499a376780da00560e857, < 28c4d9bc0708956c1a736a9e49fee71b65deee81 | 6aa628c45875e7b8cca81ed9447a12a0e8f3504a | a97e75203733be0a4263a78fb7b29352be150c1c | 3554b46204e67333e1fb8be0e93936fb08267c80 | 5cff77b9827a956d076168b56775aad23bce87e4 | 8deedce385d220f90e435f534d71d27526273515 | 2225a5cd2fbc2ef0e0f78e585db3844f60416a39 | 02e838963fdaa6ce8570b5389aecdc6cf1fb40b0 | 01eb3106f43335fdc02111358dae80a5c3fd324d | ≥ 4.4.284, < 4.5 | ≥ 4.9.283, < 4.10 | ≥ 4.14.247, < 4.15 | ≥ 4.19.207, < 4.20 | ≥ 5.4.148, < 5.5 | ≥ 5.10.67, < 5.11 | ≥ 5.13.19, < 5.14 | ≥ 5.14.6, < 5.15 | 5.15

3 vendors · 156 products

References

24 links
Show all 24 references