A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.
Conclusion & alert: CVE-2025-49179 is rated Low Risk (36.1/100): CVSS High severity, with low exploitation likelihood (EPSS 0.28%). 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 | 2026-06-15 | 0.15% | 0.28% | +0.12% |
| 2 | 2026-04-13 | 0.05% | 0.15% | +0.10% |
| 3 | 2026-03-03 | — | 0.05% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.3 | 3.1 | HIGH |
|
1.8 | 5.5 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-49179: 2 source package rows (xorg-server, xwayland); 4 state rows across 2 repos (3.22-community, edge-community); fixed 4, open 0. | https://security.alpinelinux.org/vuln/CVE-2025-49179 |
debian
|
not yet assigned | CVE-2025-49179 not yet assigned priority: Debian including 2 source packages (xorg-server, xwayland), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7, open 2. | https://security-tracker.debian.org/tracker/CVE-2025-49179 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-49179 |
suse
|
high | CVE-2025-49179 severity important: SUSE including 319 source package names (21.1-46.1:xorg-x11-server-21.1.11-150600.5.12.1, 21.1-46.1:xorg-x11-server-Xvfb-21.1.11-150600.5.12.1, …), 405 product×package rows across 56 product lines (Container suse/kiosk/xorg, Image SLES15-SP4-SAP, … (56 product lines)): Known Affected 231, Fixed 174. | https://www.suse.com/security/cve/CVE-2025-49179/ |
ubuntu
|
medium | CVE-2025-49179 medium priority: Ubuntu including 7 source packages (xorg, xorg-hwe-16.04, …), 53 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 20, released 17, not-affected 13, needs-triage 3. | https://ubuntu.com/security/CVE-2025-49179 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| No affected products in dataset. | |||