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…

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.

Scores

EPSS (exploitation in 30 days)

4.3% · top 8.9% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

• n/a
• CWE-189 (opens in a new tab)All about CWE-189 and its CVEs

Affected products

• n/a

  • affected n/a

References (7)

• USN-2568-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• http://www.oracle.com/technetwork/topics/security/bulletinjul2015-2511963.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• 73962 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• DSA-3224 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
• [oss-security] 20150409 Re: CVE Request: libX11: buffer overflow in MakeBigReq macro (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [xorg-announce] 20150414 [ANNOUNCE] X.Org Security Advisory: Buffer overflow in MakeBigReq macro (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• https://bugs.freedesktop.org/show_bug.cgi?id=56508 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2013-7439](https://trackcve.app/badge/CVE-2013-7439.svg)](https://trackcve.app/cve/CVE-2013-7439)

Record last updated 6 Aug 2024, 18:09 UTC.