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Slackware 15.0 mozilla-firefox Critical Security Update for 2026-139-02

slackware
Calendar Grey May 19, 2026
Dist Slackware Esm H88
Critical Security Advisory for Slackware mozilla-firefox. Update required to address multiple security issues and improve safety.
New mozilla-firefox packages are available for Slackware 15.0 and -current to fix security issues.

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/mozilla-firefox-140.11.0esr-i686-1_slack15.0.txz: Upgraded. This update contains security fixes and improvements. For more information, see: https://www.mozilla.org/en-US/firefox/140.11.0/releasenotes/ https://www.mozilla.org/security/advisories/mfsa2026-48 https://www.cve.org/CVERecord?id=CVE-2026-8946 https://www.cve.org/CVERecord?id=CVE-2026-8388 https://www.cve.org/CVERecord?id=CVE-2026-8947 https://www.cve.org/CVERecord?id=CVE-2026-8391 https://www.cve.org/CVERecord?id=CVE-2026-8401 https://www.cve.org/CVERecord?id=CVE-2026-8949 https://www.cve.org/CVERecord?id=CVE-2026-8950 https://www.cve.org/CVERecord?id=CVE-2026-8953 https://www.cve.org/CVERecord?id=CVE-2026-8954 https://www.cve.org/CVERecord?id=CVE-2026-8955 https://www.cve.org/CVERecord?id=CVE-2026-8956 https://www.cve.org/CVERecord?id=CVE-2026-8957

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory security issue critical DoS slackware mozilla firefox

Where Find New Packages

Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-)
Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you.
Updated package for Slackware 15.0: ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/mozilla-firefox-140.11.0esr-i686-1_slack15.0.txz
Updated package for Slackware x86_64 15.0: ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/mozilla-firefox-140.11.0esr-x86_64-1_slack15.0.txz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-firefox-140.11.0esr-i686-1.txz
Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-firefox-140.11.0esr-x86_64-1.txz

MD5 Signatures

Slackware 15.0 package: 00b192679db99c8fd6f69276a065c366 mozilla-firefox-140.11.0esr-i686-1_slack15.0.txz
Slackware x86_64 15.0 package: a5f80a30d6d65a39154d0cbb3e421a48 mozilla-firefox-140.11.0esr-x86_64-1_slack15.0.txz
Slackware -current package: 8fb4dbb54f3fa93a26183077c6864a15 xap/mozilla-firefox-140.11.0esr-i686-1.txz
Slackware x86_64 -current package: d5fc0bdbd859761aa86ee73653327221 xap/mozilla-firefox-140.11.0esr-x86_64-1.txz

Severity
critical
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory security issue critical DoS slackware mozilla firefox

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Installation Instructions

Installation instructions: Upgrade the package as root: # upgradepkg mozilla-firefox-140.11.0esr-i686-1_slack15.0.txz

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