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CVE-2019-9796 A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh…
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 60.6 | earliest → < 60.6 | 60.6 |
| Firefox ESR 60.6 | earliest → < 60.6 | 60.6 |
| Firefox 66 | earliest → < 66 | 66 |
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