5.5

CVE-2024-40938: landlock: Fix d_parent walk

Modified
AliasesUBUNTU-CVE-2024-40938DEBIAN-CVE-2024-40938
Published 12-07-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-40938 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.25%
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 14 · Related 12
DLA-4008-1DSA-5731-1SUSE-SU-2024:3194-1SUSE-SU-2024:3195-1SUSE-SU-2024:3383-1SUSE-SU-2025:20044-1

Timeline

  1. 12-07-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: landlock: Fix d_parent walk The WARN_ON_ONCE() in collect_domain_accesses() can be triggered when trying to link a root mount point. This cannot work in practice because this directory is mounted, but the VFS check is done after the call to security_path_link(). Do not use source directory's d_parent when the source directory is the mount point. [mic: Fix commit message]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% 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.

Ubuntu92 products
  • linux< 6.8.0-44.44
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1015.16
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b91c3e4ea756b12b7d992529226edce1cfd854d7, < b6e5e696435832b33e40775f060ef5c95f4fda1f | ≥ b91c3e4ea756b12b7d992529226edce1cfd854d7, < cc30d05b34f9a087a6928d09b131f7b491e9ab11 | ≥ b91c3e4ea756b12b7d992529226edce1cfd854d7, < c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6 | ≥ b91c3e4ea756b12b7d992529226edce1cfd854d7, < 88da52ccd66e65f2e63a6c35c9dff55d448ef4dc | 5.19
  • linux_kernel≥ 5.19, < 6.1.95 | ≥ 6.2, < 6.6.35 | ≥ 6.7, < 6.9.6 | 6.10:rc1
Debian1 product
  • linux< 6.1.99-1 | < 6.9.7-1

3 vendors · 95 products

References

16 links
Show all 16 references