Mageia 9 Firefox Thunderbird Important Memory Safety Fixes MGASA-2026-0106
mageia
April 21, 2026
MGASA-2026-0106 - Updated firefox & thunderbird packages fix security vulnerabilities
Summary
Description:
Memory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1,
Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2.
(CVE-2026-5731)
Incorrect boundary conditions, integer overflow in the Graphics: Text
component. (CVE-2026-5732)
Memory safety bugs fixed in Firefox ESR 140.9.1, Thunderbird ESR
140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2. (CVE-2026-5734)
References
- https://bugs.mageia.org/show_bug.cgi?id=35338
- https://www.firefox.com/en-US/firefox/140.9.1/releasenotes/
- https://www.thunderbird.net/en-US/thunderbird/140.9.1esr/releasenotes/
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-27/
- https://www.mozilla.org/en-US/security/advisories/mfsa2026-29/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5731
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5732
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5734
Topics Covered
Resolution
SRPMS
- 9/core/firefox-140.9.1-1.mga9
- 9/core/firefox-l10n-140.9.1-1.mga9
- 9/core/thunderbird-140.9.1-1.mga9
- 9/core/firefox-l10n-140.9.1-1.mga9
PREVIOUS
NEXT
Severity
important
Lowest
Low
Medium
High
Critical
Publication date: 21 Apr 2026
URL: https://advisories.mageia.org/MGASA-2026-0106.html
Type: security
CVE: CVE-2026-5731,
CVE-2026-5732,
CVE-2026-5734
Topics Covered
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