Multiple buffer overflows in X.org libX11 1.5.99.901 (1.6 RC1) and earlier allow X servers to cause a denial of service (crash) and possibly execute arbitrary code via crafted length or index values to the (1) XAllocColorCells, (2) _XkbReadGetDeviceInfoReply, (3) _XkbReadGeomShapes, (4) _XkbReadGetGeometryReply, (5) _XkbReadKeySyms, (6) _XkbReadKeyActions, (7) _XkbReadKeyBehaviors, (8) _XkbReadModifierMap, (9) _XkbReadExplicitComponents, (10) _XkbReadVirtualModMap, (11) _XkbReadGetNamesReply, (12) _XkbReadGetMapReply, (13) _XimXGetReadData, (14) XListFonts, (15) XListExtensions, and (16) XGetFontPath functions.
Conclusion & alert: CVE-2013-1997 is rated Moderate Risk (56.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.13%). Core evidence: EPSS rose +1.40% over the last day, indicating growing attacker interest. Mandatory action: Review affected assets and schedule remediation.
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 | 0.73% | 2.13% | +1.40% |
| 2 | 2025-07-13 | 1.30% | 0.73% | -0.57% |
| 3 | 2025-03-30 | — | 1.30% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2013-1997 not yet assigned priority: Debian including 1 source packages (libx11), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2013-1997 |
gentoo
|
high | CVE-2013-1997: 1 GLSA(s) (201405-07), 1 atom(s) (x11-base/xorg-server); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1997 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2013-1997 |
suse
|
medium | CVE-2013-1997 severity moderate: SUSE including 67 source package names (Mesa, libX11-6-1.6.2-11.1, …), 151 product×package rows across 45 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 11 SP3, … (45 product lines)): Fixed 148, Known Not Affected 3. | https://www.suse.com/security/cve/CVE-2013-1997/ |
ubuntu
|
medium | CVE-2013-1997 medium priority: Ubuntu including 1 source packages (libx11), 5 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 4, pending 1. | https://ubuntu.com/security/CVE-2013-1997 |