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OpenAdvisories
High ALSA-2024:0003 11 CVEs

Important: thunderbird security update

Published Jan 2, 2024 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 115.6.0.

Security Fix(es):

* Mozilla: Heap-buffer-overflow affecting WebGL <code>DrawElementsInstanced</code> method with Mesa VM driver (CVE-2023-6856)
* Mozilla: Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (CVE-2023-6864)
* Mozilla: S/MIME signature accepted despite mismatching message date (CVE-2023-50761)
* Mozilla: Truncated signed text was shown with a valid OpenPGP signature (CVE-2023-50762)
* Mozilla: Symlinks may resolve to smaller than expected buffers (CVE-2023-6857)
* Mozilla: Heap buffer overflow in <code>nsTextFragment</code> (CVE-2023-6858)
* Mozilla: Use-after-free in PR_GetIdentitiesLayer (CVE-2023-6859)
* Mozilla: Potential sandbox escape due to <code>VideoBridge</code> lack of texture validation (CVE-2023-6860)
* Mozilla: Heap buffer overflow affected <code>nsWindow::PickerOpen(void)</code> in headless mode (CVE-2023-6861)
* Mozilla: Use-after-free in <code>nsDNSService</code> (CVE-2023-6862)
* Mozilla: Undefined behavior in <code>ShutdownObserver()</code> (CVE-2023-6863)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
AlmaLinux · 8 thunderbird 115.6.0-1.el8_9.alma

Vulnerabilities 11

References

  • report
    https://access.redhat.com/security/cve/CVE-2023-50761
  • report
    https://access.redhat.com/security/cve/CVE-2023-50762
  • report
    https://access.redhat.com/security/cve/CVE-2023-6856
  • report
    https://access.redhat.com/security/cve/CVE-2023-6857
  • report
    https://access.redhat.com/security/cve/CVE-2023-6858
  • report
    https://access.redhat.com/security/cve/CVE-2023-6859
  • report
    https://access.redhat.com/security/cve/CVE-2023-6860
  • report
    https://access.redhat.com/security/cve/CVE-2023-6861
  • report
    https://access.redhat.com/security/cve/CVE-2023-6862
  • report
    https://access.redhat.com/security/cve/CVE-2023-6863
  • report
    https://access.redhat.com/security/cve/CVE-2023-6864
  • report
    https://bugzilla.redhat.com/2255360
  • report
    https://bugzilla.redhat.com/2255362
  • report
    https://bugzilla.redhat.com/2255363
  • report
    https://bugzilla.redhat.com/2255364
  • report
    https://bugzilla.redhat.com/2255365
  • report
    https://bugzilla.redhat.com/2255367
  • report
    https://bugzilla.redhat.com/2255368
  • report
    https://bugzilla.redhat.com/2255369
  • report
    https://bugzilla.redhat.com/2255370
  • report
    https://bugzilla.redhat.com/2255378
  • report
    https://bugzilla.redhat.com/2255379
  • advisory
    https://errata.almalinux.org/8/ALSA-2024-0003.html