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OpenAdvisories
High ALAS2-2026-3295 3 CVEs

Important: thunderbird security update (Amazon Linux 2)

Published May 11, 2026 · Updated May 13, 2026

Ecosystem: Amazon Linux

Summary

Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2026-7323: Memory safety bugs present in Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1 and Firefox ESR 140.10.1. CVE-2026-7322: Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1. CVE-2026-7321: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox ESR 140.10.1.

Fixed packages 1

ReleasePackageFixed in
Amazon Linux · 2 thunderbird 0:140.10.1-1.amzn2.0.1

Vulnerabilities 3

  • Critical 9.6
    CVE-2026-7321

    Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component

    Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Thunderbird 150, Firefox ESR 140.10.1, and Thunderbird 140.10.1.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Wolfi
  • High 7.3
    CVE-2026-7322

    Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

    Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability wa…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 7.3
    CVE-2026-7323

    Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1

    Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability wa…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi

References

  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-7321.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-7322.html
  • web
    https://alas.aws.amazon.com/cve/html/CVE-2026-7323.html