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Slackware 15.0 Mozilla Thunderbird Critical Buffer Overflow CVE-2026-2447

slackware
Calendar Grey February 16, 2026
Dist Slackware Esm H88
New releases of mozilla-thunderbird for Slackware tackle a critical buffer overflow issue, enhancing security for users.
New mozilla-thunderbird packages are available for Slackware 15.0 and -current to fix a security issue.

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/mozilla-thunderbird-140.7.2esr-i686-1_slack15.0.txz: Upgraded. This update contains a security fix: Heap buffer overflow in libvpx. For more information, see: https://www.mozilla.org/en-US/thunderbird/140.7.2esr/releasenotes/ https://www.mozilla.org/en-US/security/advisories/mfsa2026-11/ https://www.cve.org/CVERecord?id=CVE-2026-2447 (* Security fix *)

Topics%20covered

Topics Covered

security advisory security issue buffer overflow important slackware mozilla thunderbird

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-thunderbird-140.7.2esr-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-140.7.2esr-x86_64-1_slack15.0.txz
Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/xap/mozilla-thunderbird-140.7.2esr-i686-1.txz
Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/xap/mozilla-thunderbird-140.7.2esr-x86_64-1.txz

MD5 Signatures

Slackware 15.0 package: d9e5e02ffc93e069f0da35af2416d791 mozilla-thunderbird-140.7.2esr-i686-1_slack15.0.txz
Slackware x86_64 15.0 package: 0973e09576099cd1ca7e60c4ab9af749 mozilla-thunderbird-140.7.2esr-x86_64-1_slack15.0.txz
Slackware -current package: cc6c3bea9160ef3e27fe8e676b988527 xap/mozilla-thunderbird-140.7.2esr-i686-1.txz
Slackware x86_64 -current package: d4f235f9fe83e7c4d2c8f1573538857c xap/mozilla-thunderbird-140.7.2esr-x86_64-1.txz

Severity
important
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory security issue buffer overflow important slackware mozilla thunderbird

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Installation Instructions

Installation instructions: Upgrade the package as root: # upgradepkg mozilla-thunderbird-140.7.2esr-i686-1_slack15.0.txz

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