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OpenAdvisories
High ELSA-2026-68549 10 CVEs

Important: firefox security update (Oracle Linux 8)

Published Sep 17, 2026 · Updated Sep 17, 2026

Summary

[140.15.0-1.0.1]
- Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079789]
- diable wasi_sdk to prevent build failure with newer llvm

[140.15.0]
- Add debranding patches (Mustafa Gezen)
- Add OpenELA default preferences (Louis Abel)

[140.15.0-1]
- Update to 140.15.0 ESR

Fixed packages 1

ReleasePackageFixed in
Oracle Linux · 8 firefox 0:140.15.0-1.0.1.el8_10

Vulnerabilities 10

  • Critical 10.0

    Sandbox escape in the Remote Settings Client component

    Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Thunderbird 154, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 140.15, and Thunderbird 153.2.

  • Critical 9.8

    Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

    Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have bee…

  • Critical 9.6

    Sandbox escape due to use-after-free in the DOM: Navigation component

    Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  • Critical 9.6

    Sandbox escape due to use-after-free in the DOM: Security component

    Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  • High 8.8

    Privilege escalation in the DOM: Workers component

    Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153, Thunderbird 153, Firefox ESR 140.15, and Thunderbird 140.15.

  • High 8.8

    Privilege escalation due to invalid pointer in the Graphics component

    Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  • High 7.5

    Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

    Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have bee…

  • Medium 5.4

    Use-after-free in the Audio/Video component

    Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  • Medium 5.4

    Use-after-free in the Audio/Video component

    Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

  • Medium 5.4

    Use-after-free in the DOM: Core & HTML component

    Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.