The Slackware Linux Security Team released new packages to patch security issues in Mozilla Thunderbird and Firefox. Users on Slackware 15.0 or the current development branch should upgrade to version 140.9.1esr to resolve these problems. Specific CVEs are listed in the advisory text for anyone needing more granular details about the flaws. Installation requires root access so you must run upgradepkg with the correct package file names from the FTP server.

mozilla-thunderbird (SSA:2026-098-02)
mozilla-firefox (SSA:2026-098-01)

mozilla-thunderbird (SSA:2026-098-02)

mozilla-thunderbird (SSA:2026-098-02)

New mozilla-thunderbird packages are available for Slackware 15.0 and -current
to fix security issues.

Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/mozilla-thunderbird-140.9.1esr-i686-1_slack15.0.txz: Upgraded.
This release contains security fixes and improvements.
For more information, see:
https://www.mozilla.org/en-US/thunderbird/140.9.1esr/releasenotes/
https://www.mozilla.org/en-US/security/advisories/mfsa2026-29/
https://www.cve.org/CVERecord?id=CVE-2026-5732
https://www.cve.org/CVERecord?id=CVE-2026-5731
https://www.cve.org/CVERecord?id=CVE-2026-5734
(* Security fix *)
+--------------------------+

Where to find the 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-thunderbird-140.9.1esr-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-thunderbird-140.9.1esr-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-thunderbird-140.9.1esr-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-thunderbird-140.9.1esr-x86_64-1.txz

MD5 signatures:
+-------------+

Slackware 15.0 package:
de72b93eb09d9106f58b985251306f67 mozilla-thunderbird-140.9.1esr-i686-1_slack15.0.txz

Slackware x86_64 15.0 package:
3c6b520240ef7048acdc8e47abde8213 mozilla-thunderbird-140.9.1esr-x86_64-1_slack15.0.txz

Slackware -current package:
102f2fb97f0075e42a2a70695c8e40bd xap/mozilla-thunderbird-140.9.1esr-i686-1.txz

Slackware x86_64 -current package:
bc3cf4b17402da1c60c4c6d1925b401c xap/mozilla-thunderbird-140.9.1esr-x86_64-1.txz

Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg mozilla-thunderbird-140.9.1esr-i686-1_slack15.0.txz

+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key

mozilla-firefox (SSA:2026-098-01)

mozilla-firefox (SSA:2026-098-01)

New mozilla-firefox packages are available for Slackware 15.0 and -current to
fix security issues.

Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/mozilla-firefox-140.9.1esr-i686-1_slack15.0.txz: Upgraded.
This update contains security fixes and improvements.
For more information, see:
https://www.mozilla.org/en-US/firefox/140.9.1/releasenotes/
https://www.mozilla.org/security/advisories/mfsa2026-27/
https://www.cve.org/CVERecord?id=CVE-2026-5732
https://www.cve.org/CVERecord?id=CVE-2026-5731
https://www.cve.org/CVERecord?id=CVE-2026-5734
(* Security fix *)
+--------------------------+

Where to find the 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-140.9.1esr-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-140.9.1esr-x86_64-1_slack15.0.txz

Updated package for Slackware -current:
ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-firefox-140.9.1esr-i686-1.txz

Updated package for Slackware x86_64 -current:
ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-firefox-140.9.1esr-x86_64-1.txz

MD5 signatures:
+-------------+

Slackware 15.0 package:
127b7e697d3652a8e587f84a59989d00 mozilla-firefox-140.9.1esr-i686-1_slack15.0.txz

Slackware x86_64 15.0 package:
3145eefad8507eef57532971468d29f9 mozilla-firefox-140.9.1esr-x86_64-1_slack15.0.txz

Slackware -current package:
7158a0714471f09bd9a615e34b8baf99 xap/mozilla-firefox-140.9.1esr-i686-1.txz

Slackware x86_64 -current package:
f9f2ebd2e5f6221eccce50a7f735e16d xap/mozilla-firefox-140.9.1esr-x86_64-1.txz

Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg mozilla-firefox-140.9.1esr-i686-1_slack15.0.txz

+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key