vulnerability

Red Hat: CVE-2023-6864: Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (Multiple Advisories)

Try Surface Command

Back to search

Severity	CVSS	Published	Added	Modified
9	(AV:N/AC:M/Au:N/C:C/I:C/A:C)	Dec 19, 2023	Jan 3, 2024	Aug 11, 2025

Severity

CVSS

(AV:N/AC:M/Au:N/C:C/I:C/A:C)

Published

Dec 19, 2023

Added

Jan 3, 2024

Modified

Aug 11, 2025

Description

Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Solutions

no-fix-redhat-rpm-packageredhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-firefox-x11redhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource

References

NEW

Explore Exposure Command

Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.

Try it today