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ALSA-2021:5013 — Important: firefox security update

2026-10-03T12:03:55.105288+00:00

Affected: AlmaLinux:8: firefox

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 91.4.0 ESR.

Security Fix(es):

* Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

* Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

* Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

* Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

* Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

* Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

* Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

* Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

* Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

* Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2021-06191

2026-10-03T12:03:55.105384+00:00

bdu:2021-06191

certfr-2021-avi-924 — De multiples vulnérabilités ont été découvertes dans Mozilla Firefox et Firefox ESR. Certaines d'entre elles permettent…

2026-10-03T12:03:55.105402+00:00

certfr-2021-avi-924

cnvd-2021-99619

2026-10-03T12:03:55.105418+00:00

cnvd-2021-99619

EUVD-2026-32540

2026-10-03T12:03:55.105430+00:00

EUVD-2026-32540

fkie_cve-2021-43539

2026-10-03T12:03:55.105441+00:00

Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC occurring within the call not tracing those live pointers. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

GHSA-cx8r-rrrj-cfxg

2026-10-03T12:03:55.105464+00:00

gsd-2021-43539

2026-10-03T12:03:55.105480+00:00

gsd-2021-43539

OESA-2023-1673 — firefox security update

2026-10-03T12:03:55.105492+00:00

Affected: openEuler:22.03-LTS: firefox

Mozilla Firefox is a standalone web browser, designed for standards compliance and performance. Its functionality can be enhanced via a plethora of extensions. Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. Security Fix(es): Mozilla developers reported memory safety bugs present in Firefox for Android 79. 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 < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.(CVE-2020-15670) Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.(CVE-2020-15673) Mozilla developers reported memory safety bugs present in Firefox 80. 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 < 81.(CVE-2020-15674) When processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash. This vulnerability affects F…

openSUSE-SU-2021:1575-1 — Security update for MozillaFirefox

2026-10-03T12:03:55.105945+00:00

Security update for MozillaFirefox

RHSA-2021:5015 — Red Hat Security Advisory: firefox security update

2026-10-03T12:03:55.105968+00:00

Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4 Mozilla: URL leakage when navigating while executing asynchronous function Mozilla: Heap buffer overflow when using structured clone Mozilla: Missing fullscreen and pointer lock notification when requesting both Mozilla: GC rooting failure when calling wasm instance methods Mozilla: External protocol handler parameters were unescaped Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler Mozilla: Bypass of CSP sandbox directive when embedding Mozilla: Denial of Service when using the Location API in a loop Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed

SUSE-SU-2021:14859-1 — Security update for MozillaFirefox

2026-10-03T12:03:55.105998+00:00

Security update for MozillaFirefox

UBUNTU-CVE-2021-43539

2026-10-03T12:03:55.106016+00:00

Affected: Ubuntu:18.04:LTS: firefox, Ubuntu:18.04:LTS: thunderbird, Ubuntu:18.04:LTS: mozjs52, Ubuntu:18.04:LTS: mozjs38, Ubuntu:20.04:LTS: firefox, Ubuntu:20.04:LTS: thunderbird, Ubuntu:20.04:LTS: mozjs68, Ubuntu:20.04:LTS: mozjs52, Ubuntu:22.04:LTS: firefox, Ubuntu:22.04:LTS: mozjs78

WID-SEC-W-2022-0302 — Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit Administrator…

2026-10-03T12:03:55.106049+00:00

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um beliebigen Programmcode auszuführen, einen Cross-Site-Scripting-Angriff durchzuführen, Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen oder Dateien zu manipulieren.