CVE-2024-40972

ext4: do not create EA inode under buffer lock

At a glance

Severity
Not available
EPSS
EPSS 0.22 % · percentile 13 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: do not create EA inode under buffer lock ext4_xattr_set_entry() creates new EA inodes while holding buffer lock on the external xattr block. This is problematic as it nests all the allocation locking (which acquires locks on other buffers) under the buffer lock. This can even deadlock when the filesystem is corrupted and e.g. quota file is setup to contain xattr block as data block. Move the allocation of EA inode out of ext4_xattr_set_entry() into the callers.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected e50e5129f384ae282adebfb561189cdb19b81cee < 0752e7fb549d90c33b4d4186f11cfd25a556d1dd ; affected e50e5129f384ae282adebfb561189cdb19b81cee < 737fb7853acd5bc8984f6f42e4bfba3334be8ae1 ; affected e50e5129f384ae282adebfb561189cdb19b81cee < 111103907234bffd0a34fba070ad9367de058752 ; affected e50e5129f384ae282adebfb561189cdb19b81cee < 0a46ef234756dca04623b7591e8ebb3440622f0b
Linux · Linuxaffected 4.13 ; unaffected 0 < 4.13 ; unaffected 6.1.107 ≤ 6.1.* ; unaffected 6.6.47 ≤ 6.6.* ; unaffected 6.9.7 ≤ 6.9.* ; unaffected 6.10 ≤ *

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD