{"cve":"CVE-2013-7439","nvd":{"published":"2015-04-16T14:59:00.070","modified":"2026-06-17T00:01:57.460","status":"Modified","description":"Multiple off-by-one errors in the (1) MakeBigReq and (2) SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allow remote attackers to have unspecified impact via a crafted request, which triggers a buffer overflow.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://lists.x.org/archives/xorg-announce/2015-April/002561.html","http://seclists.org/oss-sec/2015/q2/81","http://www.debian.org/security/2015/dsa-3224","http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html","http://www.securityfocus.com/bid/73962"],"products":["canonical:ubuntu_linux","debian:debian_linux","x.org:libx11","x.org:x11"],"source":"nvd","synced_at":"2026-10-19T20:35:35.528235705+00:00"},"epss":{"cve":"CVE-2013-7439","score":0.04251,"percentile":0.91053,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}