GHSA-cjgm-66pw-5r9r · Severity: high — A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC...
A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.
Conclusion & alert: CVE-2026-34001 is rated Low Risk (32.2/100): CVSS High severity, with low exploitation likelihood (EPSS 0.01%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-24 | — | 0.01% | — |
Full EPSS history (1 record total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
GHSA-cjgm-66pw-5r9r · Severity: high — A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-34001 not yet assigned priority: Debian including 2 source packages (xorg-server, xwayland), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 6, open 3. | https://security-tracker.debian.org/tracker/CVE-2026-34001 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2026-34001 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2026-34001/ |
ubuntu
|
medium | CVE-2026-34001 medium priority: Ubuntu including 7 source packages (xorg, xorg-hwe-16.04, …), 46 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 16, needs-triage 16, not-affected 12, released 2. | https://ubuntu.com/security/CVE-2026-34001 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||