nilfs2: add missing check for inode numbers on directory entries (Linux Linux)

CVE-2024-42104
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.26 % · centile 18 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: add missing check for inode numbers on directory entries Syzbot reported that mounting and unmounting a specific pattern of corrupted nilfs2 filesystem images causes a use-after-free of metadata file inodes, which triggers a kernel bug in lru_add_fn(). As Jan Kara pointed out, this is because the link count of a metadata file gets corrupted to 0, and nilfs_evict_inode(), which is called from iput(), tries to delete that inode (ifile inode in this case). The inconsistency occurs because directories containing the inode numbers of these metadata files that should not be visible in the namespace are read without checking. Fix this issue by treating the inode numbers of these internal files as errors in the sanity check helper when reading directory folios/pages. Also thanks to Hillf Danton and Matthew Wilcox for their initial mm-layer analysis.

Faiblesses (CWE)

  • CWE-416 — Utilisation après libération

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 2ba466d74ed74f073257f86e61519cb8f8f46184 < c33c2b0d92aa1c2262d999b2598ad6fbd53bd479 ; affected 2ba466d74ed74f073257f86e61519cb8f8f46184 < 07c176e7acc5579c133bb923ab21316d192d0a95 ; affected 2ba466d74ed74f073257f86e61519cb8f8f46184 < 2f2fa9cf7c3537958a82fbe8c8595a5eb0861ad7 ; affected 2ba466d74ed74f073257f86e61519cb8f8f46184 < b11e8fb93ea5eefb2e4e719497ea177a58ff6131 ; affected 2ba466d74ed74f073257f86e61519cb8f8f46184 < 1b7d549ed2c1fa202c751b69423a0d3a6bd5a180 ; affected 2ba466d74ed74f073257f86e61519cb8f8f46184 < 3ab40870edb883b9633dc5cd55f5a2a11afa618d
Linux · Linuxaffected 2.6.30 ; unaffected 0 < 2.6.30 ; unaffected 4.19.318 ≤ 4.19.* ; unaffected 5.4.280 ≤ 5.4.* ; unaffected 5.10.222 ≤ 5.10.* ; unaffected 5.15.163 ≤ 5.15.*

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