CVE-2019-9796
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 2.1%
exploitation probability
2.1%top 20% of all CVEs
observed exploitation
nono source reports it
A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
References
https://access.redhat.com/errata/RHSA-2019:0966https://access.redhat.com/errata/RHSA-2019:1144https://bugzilla.mozilla.org/show_bug.cgi?id=1531277https://www.mozilla.org/security/advisories/mfsa2019-07/https://www.mozilla.org/security/advisories/mfsa2019-08/https://www.mozilla.org/security/advisories/mfsa2019-11/