CVE-2021-21781

Linux Kernel

MEDIUM 4.0

En bref

Source
NVD
EPSS
EPSS 0.50 % · centile 42 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
talos
Statut NVD
Modified

Description

An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66 and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process’s memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222 4.19.177 5.4.99 5.10.17 5.11

Faiblesses (CWE)

  • CWE-908 — Utilisation d'une ressource non initialisée

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.0MEDIUM 4.0CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Ntalos
CVSS 3.1LOW 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NNVD · nvd@nist.gov (Primary)
CVSS 3.0MEDIUM 4.0CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NNVD · talos-cna@cisco.com (Secondary)
CVSS 2.0LOW 2.1AV:L/AC:L/Au:N/C:P/I:N/A:NNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux Kernelaffected Linux Kernel v5.4.54, Linux Kernel v5.4.66

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