Description
Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 115.44 |
| Mozilla | Thunderbird | — | 153.5 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 153.5.0esr-1 | — |
| Debian 14 | thunderbird | 1:153.5.0esr-1 | — |
| Debian 13 | firefox-esr | 153.5.0esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:153.5.1esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 153.5.0esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:153.5.1esr-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +3 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | firefox | 153.5.0-1.el10_2 | RHSA-2026:89758 |
| RHEL 9 | firefox +2 | 153.5.0-1.el9_8 | RHSA-2026:93443, RHSA-2026:89757 |
| RHEL 8 | firefox | 153.5.0-1.el8_10 | RHSA-2026:89756 |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox +1 | 153.5.0-1.el10_0 | RHSA-2026:99050, RHSA-2026:98952 |
| RHEL 9.6 EUS | firefox +2 | 153.5.0-1.el9_6 | RHSA-2026:98124, RHSA-2026:95596 |
| RHEL 9.4 E4S | firefox +2 | 153.5.0-1.el9_4 | RHSA-2026:98123, RHSA-2026:95597 |
| RHEL 9.2 E4S | firefox +2 | 153.5.0-1.el9_2 | RHSA-2026:99749, RHSA-2026:98128 |
| RHEL 8.8 TUS | firefox | 153.5.0-1.el8_8 | RHSA-2026:99070 |
| RHEL 8.8 E4S | firefox | 153.5.0-1.el8_8 | RHSA-2026:99070 |
| RHEL 8.6 EUS Long Life | firefox | 153.5.0-1.el8_6 | RHSA-2026:99013 |
| RHEL 8.6 AUS | firefox | 153.5.0-1.el8_6 | RHSA-2026:99013 |
| RHEL 8.4 EUS Long Life | firefox | 153.5.0-1.el8_4 | RHSA-2026:99510 |
| RHEL 8.4 AUS | firefox | 153.5.0-1.el8_4 | RHSA-2026:99510 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 153.5.0-1.el10_2 | ALSA-2026:89758 |
| AlmaLinux 9 | firefox +1 | 153.5.0-1.el9_8 | ALSA-2026:89757 |
| AlmaLinux 9 | thunderbird | 153.5.0-1.el9_8.alma.1 | ALSA-2026:93443 |
| AlmaLinux 8 | firefox | 153.5.0-1.el8_10 | ALSA-2026:89756 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox | 153.5.0-1.el10_2 | RLSA-2026:89758 |
| Rocky Linux 9 | firefox +1 | 153.5.0-1.el9_8 | RLSA-2026:93443, RLSA-2026:89757 |
| Rocky Linux 8 | firefox | 153.5.0-1.el8_10 | RLSA-2026:89756 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES 15 SP7 | MozillaThunderbird | 153.5.0-150400.13.9.1 | SUSE-SU-2026:4736-1 |
| SLES 15 SP6 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES 15 SP5 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES 15 SP4 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES 12 SP5 | MozillaFirefox | 153.5.0-118.16.2 | SUSE-SU-2026:4806-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | MozillaFirefox | 153.5.0-160000.1.1 | SUSE-SU-2026:24260-1 |
| SLES for SAP 15 SP6 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLES 16.0 | MozillaFirefox | 153.5.0-160000.1.1 | SUSE-SU-2026:24260-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 153.5.0-150400.157.16.1 | SUSE-SU-2026:4834-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 158.0-1.1 | openSUSE-SU-2026:12190-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 153.5.1-1.1 | openSUSE-SU-2026:12224-1 |
| openSUSE Tumbleweed | firefox-esr | 153.5.0-1.1 | openSUSE-SU-2026:12116-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 153.5.0-160000.1.1 | openSUSE-SU-2026:22139-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 153.5.0-1.amzn2023.0.1 | ALAS2023-2026-3281 |
| Amazon Linux 2 | thunderbird | 153.5.1-1.amzn2.0.1 | ALAS2-2026-4057 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox | 153.5.0-1.0.1.el10_2 | ELSA-2026-89758 |
| Oracle Linux 9 | firefox +2 | 153.5.0-1.0.1.el9_8 | ELSA-2026-93443, ELSA-2026-89757 |
| Oracle Linux 8 | firefox | 153.5.0-1.0.1.el8_10 | ELSA-2026-89756 |
Advisories 39
- RHSA-2026:89757 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99510 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:95596 Red Hat Security Advisory: thunderbird security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:93443 Red Hat Security Advisory: thunderbird security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:89758 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98124 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:89756 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98952 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99070 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98123 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99749 Red Hat Security Advisory: thunderbird security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99050 Red Hat Security Advisory: thunderbird security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:95597 Red Hat Security Advisory: thunderbird security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:98128 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:99013 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- WID-SEC-2026-4216 Mozilla Firefox, Firefox ESR, und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2026-3942 Mozilla Firefox und Thunderbrid: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2026
- ALSA-2026:89758 Important: firefox security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 4, 2026
- RLSA-2026:93443 Important: thunderbird security, bug fix, and enhancement update Rocky Linux Security Advisories · Nov 3, 2026
- ALSA-2026:89756 Important: firefox security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 3, 2026
- ALSA-2026:93443 Important: thunderbird security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 2, 2026
- ALAS2-2026-4057 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 2, 2026
- ELSA-2026-93443 Important: thunderbird security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 2, 2026
- ALSA-2026:89757 Important: firefox security, bug fix, and enhancement update AlmaLinux Security Advisories · Nov 1, 2026
- RLSA-2026:89756 Important: firefox security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 31, 2026
- RLSA-2026:89757 Important: firefox security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 31, 2026
- RLSA-2026:89758 Important: firefox security, bug fix, and enhancement update Rocky Linux Security Advisories · Oct 31, 2026
- ALAS2023-2026-3281 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026
- ELSA-2026-89756 Important: firefox security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- ELSA-2026-89758 Important: firefox security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- ELSA-2026-89757 Important: firefox security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 26, 2026
- openSUSE-SU-2026:12224-1 MozillaThunderbird-153.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Oct 23, 2026
- SUSE-SU-2026:24260-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 23, 2026
- openSUSE-SU-2026:22139-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 22, 2026
- SUSE-SU-2026:4834-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 22, 2026
- SUSE-SU-2026:4806-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 21, 2026
- openSUSE-SU-2026:12190-1 MozillaFirefox-158.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 21, 2026
- SUSE-SU-2026:4736-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Oct 20, 2026
- openSUSE-SU-2026:12116-1 firefox-esr-153.5.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 14, 2026
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2059151
- https://www.mozilla.org/security/advisories/mfsa2026-106/
- https://www.mozilla.org/security/advisories/mfsa2026-108/
- https://www.mozilla.org/security/advisories/mfsa2026-109/
- https://www.mozilla.org/security/advisories/mfsa2026-110/
- https://www.mozilla.org/security/advisories/mfsa2026-119/