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CVE-2026-50261

Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free in syncchangecounter()

HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.15 % · centile 4 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
redhat
Statut NVD
Modified

Description

A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while changing those counters. This may be used to crash the server, or for privilege escalation if the X server runs as root.

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:Hredhat
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat-SADP
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · secalert@redhat.com (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Red Hat · Red Hat Enterprise Linux 10unaffected 0:24.1.9-4.el10_2.2 < *
Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Supportunaffected 0:24.1.5-6.el10_0.1 < *
Red Hat · Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSIONunaffected 0:1.1.0-25.el6_10.18 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Supportunaffected 0:1.20.4-35.el7_9 < *
Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Supportunaffected 0:1.8.0-36.el7_9.5 < *
Red Hat · Red Hat Enterprise Linux 8unaffected 0:21.1.3-20.el8_10.2 < *
Red Hat · Red Hat Enterprise Linux 8unaffected 0:1.20.11-28.el8_10.2 < *
Red Hat · Red Hat Enterprise Linux 8unaffected 0:1.15.0-10.el8_10 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 0:1.20.10-5.el8_4 < *
Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportunaffected 0:1.11.0-8.el8_4.16 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 0:1.20.10-5.el8_4 < *
Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onunaffected 0:1.11.0-8.el8_4.16 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 0:1.20.11-8.el8_6 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 0:21.1.3-2.el8_6.7 < *
Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportunaffected 0:1.12.0-6.el8_6.18 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 0:1.20.11-8.el8_6 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 0:21.1.3-2.el8_6.7 < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onunaffected 0:1.12.0-6.el8_6.18 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 0:1.20.11-19.el8_8 < *
Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Serviceunaffected 0:21.1.3-13.el8_8.1 < *

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