SUSE-SU-2025:03309-1: important: Security update for MozillaThunderbird

Tue Sep 23 16:30:33 UTC 2025

# Security update for MozillaThunderbird

Announcement ID: SUSE-SU-2025:03309-1  
Release Date: 2025-09-23T14:30:39Z  
Rating: important  
References:

  * bsc#1249391

Cross-References:

  * CVE-2025-10527
  * CVE-2025-10528
  * CVE-2025-10529
  * CVE-2025-10532
  * CVE-2025-10533
  * CVE-2025-10536
  * CVE-2025-10537

CVSS scores:

  * CVE-2025-10527 ( NVD ):  7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
  * CVE-2025-10528 ( NVD ):  7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
  * CVE-2025-10529 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2025-10532 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
  * CVE-2025-10533 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2025-10536 ( NVD ):  6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  * CVE-2025-10537 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products:

  * openSUSE Leap 15.6
  * SUSE Linux Enterprise Desktop 15 SP6
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP6
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP6
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP6
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7
  * SUSE Linux Enterprise Workstation Extension 15 SP6
  * SUSE Linux Enterprise Workstation Extension 15 SP7
  * SUSE Package Hub 15 15-SP6
  * SUSE Package Hub 15 15-SP7

An update that solves seven vulnerabilities can now be installed.

## Description:

This update for MozillaThunderbird fixes the following issues:

Update to Mozilla Thunderbird 140.3 (bsc#1249391).

Security issues fixed:

  * MFSA 2025-78
  * CVE-2025-10527: sandbox escape due to use-after-free in the Graphics:
    Canvas2D component.
  * CVE-2025-10528: sandbox escape due to undefined behavior, invalid pointer in
    the Graphics: Canvas2D component.
  * CVE-2025-10529: same-origin policy bypass in the Layout component.
  * CVE-2025-10532: incorrect boundary conditions in the JavaScript: GC
    component.
  * CVE-2025-10533: integer overflow in the SVG component.
  * CVE-2025-10536: information disclosure in the Networking: Cache component.
  * CVE-2025-10537: memory safety bugs fixed in Firefox ESR 140.3, Thunderbird
    ESR 140.3, Firefox 143 and Thunderbird 143.

Other issues fixed:

  * Right-clicking 'List-ID' -> 'Unsubscribe' created double encoded draft
    subject.
  * Thunderbird could crash on startup.
  * Thunderbird could crash when importing mail.
  * Opening Website header link in RSS feed incorrectly re-encoded URL
    parameters.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * openSUSE Leap 15.6  
    zypper in -t patch openSUSE-SLE-15.6-2025-3309=1

  * SUSE Package Hub 15 15-SP6  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP6-2025-3309=1

  * SUSE Package Hub 15 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2025-3309=1

  * SUSE Linux Enterprise Workstation Extension 15 SP6  
    zypper in -t patch SUSE-SLE-Product-WE-15-SP6-2025-3309=1

  * SUSE Linux Enterprise Workstation Extension 15 SP7  
    zypper in -t patch SUSE-SLE-Product-WE-15-SP7-2025-3309=1

## Package List:

  * openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64)
    * MozillaThunderbird-debuginfo-140.3.0-150200.8.239.1
    * MozillaThunderbird-140.3.0-150200.8.239.1
    * MozillaThunderbird-debugsource-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-other-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-common-140.3.0-150200.8.239.1
  * SUSE Package Hub 15 15-SP6 (aarch64 ppc64le s390x)
    * MozillaThunderbird-debuginfo-140.3.0-150200.8.239.1
    * MozillaThunderbird-140.3.0-150200.8.239.1
    * MozillaThunderbird-debugsource-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-other-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-common-140.3.0-150200.8.239.1
  * SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x)
    * MozillaThunderbird-debuginfo-140.3.0-150200.8.239.1
    * MozillaThunderbird-140.3.0-150200.8.239.1
    * MozillaThunderbird-debugsource-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-other-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-common-140.3.0-150200.8.239.1
  * SUSE Linux Enterprise Workstation Extension 15 SP6 (x86_64)
    * MozillaThunderbird-debuginfo-140.3.0-150200.8.239.1
    * MozillaThunderbird-140.3.0-150200.8.239.1
    * MozillaThunderbird-debugsource-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-other-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-common-140.3.0-150200.8.239.1
  * SUSE Linux Enterprise Workstation Extension 15 SP7 (x86_64)
    * MozillaThunderbird-debuginfo-140.3.0-150200.8.239.1
    * MozillaThunderbird-140.3.0-150200.8.239.1
    * MozillaThunderbird-debugsource-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-other-140.3.0-150200.8.239.1
    * MozillaThunderbird-translations-common-140.3.0-150200.8.239.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-10527.html
  * https://www.suse.com/security/cve/CVE-2025-10528.html
  * https://www.suse.com/security/cve/CVE-2025-10529.html
  * https://www.suse.com/security/cve/CVE-2025-10532.html
  * https://www.suse.com/security/cve/CVE-2025-10533.html
  * https://www.suse.com/security/cve/CVE-2025-10536.html
  * https://www.suse.com/security/cve/CVE-2025-10537.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1249391

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