CVE-2019-11735

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-09-27 · updated 2026-06-17
Weakness: CWE-787

Description

Mozilla developers and community members reported memory safety bugs present in Firefox 68 and Firefox ESR 68. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.

Affected products

Mozilla Firefox: before 69.0 — fixed in 69.0
Mozilla Firefox ESR: before 68.1.0 — fixed in 68.1.0
openSUSE Leap: 15.0, 15.1

How to fix

Upgrade to a fixed version: Mozilla Firefox 69.0; Mozilla Firefox ESR 68.1.0. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1561404%2C1561484%2C1568047%2C1561912%2C1565744%2C1568858%2C1570358
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://www.mozilla.org/security/advisories/mfsa2019-26/
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1561404%2C1561484%2C1568047%2C1561912%2C1565744%2C1568858%2C1570358
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://www.mozilla.org/security/advisories/mfsa2019-26/

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