openSUSE: MozillaFirefox Important Update CVE-2021-29951 CVE-2021-29964
opensuse
September 26, 2025
An update that fixes three vulnerabilities is now available.
Description
This update for MozillaFirefox fixes the following issues:
Firefox Extended Support Release 78.11.0 ESR (bsc#1186696)
* CVE-2021-29964: Out of bounds-read when parsing a `WM=5FCOPYDATA` me=
ssage
* CVE-2021-29967: Memory safety bugs fixed in Firefox
This update was imported from the SUSE:SLE-15-SP2:Update update project.
Topics Covered
Patch
Patch Instructions:
To install this openSUSE Security Update use the SUSE recommended instal=
lation methods
like YaST online=5Fupdate or "zypper patch".
Alternatively you can run the command listed for your product:
- openSUSE Leap 15.2:
zypper in -t patch openSUSE-2021-858=3D1
Package List
- openSUSE Leap 15.2 (x86=5F64):
MozillaFirefox-78.11.0-lp152.2.58.1
MozillaFirefox-branding-upstream-78.11.0-lp152.2.58.1
MozillaFirefox-buildsymbols-78.11.0-lp152.2.58.1
MozillaFirefox-debuginfo-78.11.0-lp152.2.58.1
MozillaFirefox-debugsource-78.11.0-lp152.2.58.1
MozillaFirefox-devel-78.11.0-lp152.2.58.1
MozillaFirefox-translations-common-78.11.0-lp152.2.58.1
MozillaFirefox-translations-other-78.11.0-lp152.2.58.1
References
https://www.suse.com/security/cve/CVE-2021-29951.html
https://www.suse.com/security/cve/CVE-2021-29964.html
https://www.suse.com/security/cve/CVE-2021-29967.html
https://bugzilla.suse.com/1185633
https://bugzilla.suse.com/1186696
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Severity
important
Lowest
Low
Medium
High
Critical
Announcement ID: openSUSE-SU-2021:0858-1
Rating: important
Affected Products:
openSUSE Leap 15.2
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=
=5F=5F=5F
Topics Covered
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