Mozilla releases security updates for Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2

Hello everyone,

Mozilla has fixed several high severity security vulnerabilities in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2. The details of the vulnerabilities fixed are as follows:

Platform	CVE ID	Vulnerability	Impact
Firefox ESR 91.2, Firefox 93, Firefox ESR 78.15	CVE-2021-38496	Use-after-free in MessageTask	High
Firefox ESR 91.2, Firefox 93	CVE-2021-38497	Validation message could have been overlaid on another origin	Moderate
Firefox ESR 91.2, Firefox 93	CVE-2021-38498	Use-after-free of nsLanguageAtomService object	Moderate
Firefox 93	CVE-2021-38499	Memory safety bugs fixed in Firefox 93	High
Firefox ESR 91.2, Firefox 93, Firefox ESR 78.15	CVE-2021-38500	Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2	High
Firefox ESR 91.2, Firefox 93	CVE-2021-38501	Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2	High
Firefox ESR 91.2, Firefox 93	CVE-2021-32810	Data race in crossbeam-deque	Moderate

To patch these vulnerabilities in Windows, initiate a sync between the Central Patch Repository and the Desktop Central server. Once synced, search for the following Patch IDs or Bulletin IDs and deploy them to your target systems.

Patch ID	Bulletin ID	Patch Description
321750	TU-054	Mozilla Firefox ESR (78.15.0)
321751	TU-054	Mozilla Firefox ESR (91) (91.2.0)
321752	TU-054	Mozilla Firefox ESR (x64) (78.15.0)
321770	TU-054	Mozilla Firefox ESR (91) (x64) (91.2.0)
321748	TU-027	Mozilla Firefox (93.0)
321749	TU-027	Mozilla Firefox (x64) (93.0)