The overflow protection in Expat is removed by compilers with certain optimization settings, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via crafted XML data. NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-1283 and CVE-2015-2716.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://bugzilla.redhat.com/show_bug.cgi?id=1344251 Issue Tracking, Patch, Third Party Advisory
- https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1344251 Issue Tracking, Patch, Third Party Advisory
- https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.1 · libexpat_project, canonical, mcafeeNVD modified 2026-10-08 21:17
Affected (CPE criteria) 4
cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*cpe:2.3:a:mcafee:policy_auditor:*:*:*:*:*:*:*:*cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
References 14
- http://www.securityfocus.com/bid/91528 Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3013-1 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1344251 Issue Tracking, Patch, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory
- https://security.gentoo.org/glsa/201701-21 Third Party Advisory
- https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde Patch, Third Party Advisory
- https://www.tenable.com/security/tns-2016-20 Third Party Advisory
- http://www.securityfocus.com/bid/91528 Third Party Advisory, VDB Entry
- http://www.ubuntu.com/usn/USN-3013-1 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1344251 Issue Tracking, Patch, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365 Third Party Advisory
- https://security.gentoo.org/glsa/201701-21 Third Party Advisory
- https://sourceforge.net/p/expat/code_git/ci/f0bec73b018caa07d3e75ec8dd967f3785d71bde Patch, Third Party Advisory
- https://www.tenable.com/security/tns-2016-20 Third Party Advisory