No exploitation reported

CVE-2024-21886

No exploitation reported by the sources we read.

Published2024-02-28
WeaknessCWE-122

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding environments.

Timeline

dates in UTC

2024-02-2813:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-21886?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-21886?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP

Xorg xserver

Branch	Affected	Fixed in	Source
—	all versions	no fix published	CISA-ADP

Xorg xwayland

Branch	Affected	Fixed in	Source
—	all versions	no fix published	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

tigervncAlmaLinux:9all versions · fixed in 1.13.1-3.el9_3.6.alma.1and 6 other packages
tigervncAlmaLinux:8all versions · fixed in 1.13.1-2.el8_9.7.alma.1and 6 other packages
xorg-x11-server-XdmxAlmaLinux:9all versions · fixed in 1.20.11-24.el9and 7 other packages
xorg-x11-server-XdmxAlmaLinux:8all versions · fixed in 1.20.11-22.el8and 7 other packages
xorg-x11-server-XwaylandAlmaLinux:9all versions · fixed in 22.1.9-5.el9
xorg-x11-server-XwaylandAlmaLinux:8all versions · fixed in 21.1.3-15.el8

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2024-04-23
OpenCVESSVC decisionnone—
CNACVSS 3.17.8read 2026-10-23
CNAweakness (CWE)CWE-122read 2026-10-23
FIRST EPSSEPSS score1.4 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2024-02-28
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2024-21886?

Is CVE-2024-21886 actively exploited?

Active exploitation of CVE-2024-21886 has not been confirmed. Its EPSS score was 1.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-21886?

CVE-2024-21886 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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