quota: Fix potential NULL pointer dereference (Linux Linux)

CVE-2024-26878
MEDIUM 4.7

En bref

Source
NVD
EPSS
EPSS 0.19 % · centile 9 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.

Faiblesses (CWE)

  • CWE-362 — Situation de compétition
  • CWE-476 — Déréférencement de pointeur nul

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 8514899c1a4edf802f03c408db901063aa3f05a1 ; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 49669f8e7eb053f91d239df7b1bfb4500255a9d0 ; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 61380537aa6dd32d8a723d98b8f1bd1b11d8fee0 ; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25 ; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 7f9e833fc0f9b47be503af012eb5903086939754 ; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac < 40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
Linux · Linuxaffected 4.14 ; unaffected 0 < 4.14 ; unaffected 4.19.311 ≤ 4.19.* ; unaffected 5.4.273 ≤ 5.4.* ; unaffected 5.10.214 ≤ 5.10.* ; unaffected 5.15.153 ≤ 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