CVE-2016-5296
A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A heap-buffer-overflow in Cairo when processing SVG content caused by compiler optimization, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.39% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- mozilla/firefox · mozilla/thunderbird · debian/debian linux
- Source
- security@mozilla.org
EPSS 3.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://rhn.redhat.com/errata/RHSA-2016-2780.htmlThird Party Advisory
- http://www.securityfocus.com/bid/94339Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037298Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1292443Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/201701-15Third Party Advisory
- https://www.debian.org/security/2016/dsa-3730Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-89/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-90/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-93/Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2780.htmlThird Party Advisory
- http://www.securityfocus.com/bid/94339Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037298Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1292443Issue Tracking, Vendor Advisory
- https://security.gentoo.org/glsa/201701-15Third Party Advisory
- https://www.debian.org/security/2016/dsa-3730Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-89/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-90/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-93/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.