fuse: Initialize beyond-EOF page contents before setting uptodate (Linux Linux)

CVE-2024-44947
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.89 % · centile 59 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: Initialize beyond-EOF page contents before setting uptodate fuse_notify_store(), unlike fuse_do_readpage(), does not enable page zeroing (because it can be used to change partial page contents). So fuse_notify_store() must be more careful to fully initialize page contents (including parts of the page that are beyond end-of-file) before marking the page uptodate. The current code can leave beyond-EOF page contents uninitialized, which makes these uninitialized page contents visible to userspace via mmap(). This is an information leak, but only affects systems which do not enable init-on-alloc (via CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y or the corresponding kernel command line parameter).

Faiblesses (CWE)

  • CWE-665 — Initialisation incorrecte

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected a1d75f258230b75d46aecdf28b2e732413028863 < 49934861514d36d0995be8e81bb3312a499d8d9a ; affected a1d75f258230b75d46aecdf28b2e732413028863 < 33168db352c7b56ae18aa55c2cae1a1c5905d30e ; affected a1d75f258230b75d46aecdf28b2e732413028863 < 4690e2171f651e2b415e3941ce17f2f7b813aff6 ; affected a1d75f258230b75d46aecdf28b2e732413028863 < 8c78303eafbf85a728dd84d1750e89240c677dd9 ; affected a1d75f258230b75d46aecdf28b2e732413028863 < 831433527773e665bdb635ab5783d0b95d1246f4 ; affected a1d75f258230b75d46aecdf28b2e732413028863 < ac42e0f0eb66af966015ee33fd355bc6f5d80cd6
Linux · Linuxaffected 2.6.36 ; unaffected 0 < 2.6.36 ; unaffected 4.19.321 ≤ 4.19.* ; unaffected 5.4.283 ≤ 5.4.* ; unaffected 5.10.225 ≤ 5.10.* ; unaffected 5.15.166 ≤ 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