# CVE-2022-26486: Mozilla Firefox Use-After-Free Vulnerability CVE-2022-26486 is fixed in 8 products on 2 platforms, first by Mozilla Firefox (en-US) 97.0.2, released March 5, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 7, 2022. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/cve/CVE-2022-26486 - Priority: Patch now - CVSS: 9.8 (Critical) - EPSS: 0.0236 - CISA KEV: listed Mar 7, 2022, federal due date Mar 21, 2022 - Exploited (vendor report): yes - Publicly disclosed: no - Published: Mar 5, 2022 - Weakness: CWE-416: Use After Free - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-26486 ## Description An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox (en-US) | 97.0.2 | [Mozilla Firefox (en-US) 97.0.2](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox-97.0.2.md) | Mar 5, 2022 | | Windows apps | Mozilla Firefox ESR (en-US) | 102.0 | [Mozilla Firefox ESR (en-US) 102.0](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-102.0.md) | Jun 23, 2022 | | Windows apps | Mozilla Thunderbird (en-US) | 91.7.0 | [Mozilla Thunderbird (en-US) 91.7.0](https://patchblox.com/security/data/fix/windows-app/mozilla.thunderbird-91.7.0.md) | Mar 8, 2022 | | Linux | firefox RHEL 8 | 0:91.7.0-3.el8_5 | [RHSA-2022:0818](https://patchblox.com/security/data/fix/linux/rhsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 97.0.2+build1-0ubuntu0.18.04.1 | [firefox 97.0.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-97.0.2-build1-0ubuntu0.18.04.1.md) | Mar 5, 2022 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 97.0.2+build1-0ubuntu0.20.04.1 | [firefox 97.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-97.0.2-build1-0ubuntu0.20.04.1.md) | Mar 5, 2022 | | Linux | firefox Ubuntu 22.04.1 LTS (jammy) | 1:1snap1-0ubuntu1 | [firefox 1:1snap1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-firefox-1-1snap1-0ubuntu1.md) | Apr 6, 2022 | | Linux | firefox almalinux 8 | 91.7.0-3.el8_5.alma | [ALSA-2022:0818](https://patchblox.com/security/data/fix/linux/alsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox ol 8 | 0:91.7.0-3.0.1.el8_5 | [ELSA-2022-0818](https://patchblox.com/security/data/fix/linux/elsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox rocky 8 | 0:91.7.0-3.el8_5 | [RLSA-2022:0818](https://patchblox.com/security/data/fix/linux/rlsa-2022-0818.md) | Mar 10, 2022 | | Linux | firefox-esr Debian 12.15 (bookworm) | 91.6.1esr-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 13.5 (trixie) | 91.6.1esr-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | firefox-esr Debian 14 | 91.6.1esr-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 97.0.2+build1-0ubuntu0.18.04.1 | [firefox-geckodriver 97.0.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-97.0.2-build1-0ubuntu0.18.04.1.md) | Mar 5, 2022 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 97.0.2+build1-0ubuntu0.20.04.1 | [firefox-geckodriver 97.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-97.0.2-build1-0ubuntu0.20.04.1.md) | Mar 5, 2022 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 97.0.2+build1-0ubuntu0.18.04.1 | [firefox-mozsymbols 97.0.2+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-97.0.2-build1-0ubuntu0.18.04.1.md) | Mar 5, 2022 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 97.0.2+build1-0ubuntu0.20.04.1 | [firefox-mozsymbols 97.0.2+build1-0ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-97.0.2-build1-0ubuntu0.20.04.1.md) | Mar 5, 2022 | | Linux | thunderbird Debian 12.15 (bookworm) | 1:91.6.2-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | thunderbird Debian 13.5 (trixie) | 1:91.6.2-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | thunderbird Debian 14 | 1:91.6.2-1 | [DEBIAN-CVE-2022-26486](https://patchblox.com/security/data/fix/linux/debian-cve-2022-26486.md) | Dec 22, 2022 | | Linux | thunderbird RHEL 8 | 0:91.7.0-2.el8_5 | [RHSA-2022:0845](https://patchblox.com/security/data/fix/linux/rhsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird almalinux 8 | 91.7.0-2.el8_5.alma | [ALSA-2022:0845](https://patchblox.com/security/data/fix/linux/alsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird ol 8 | 0:91.7.0-2.0.1.el8_5 | [ELSA-2022-0845](https://patchblox.com/security/data/fix/linux/elsa-2022-0845.md) | Mar 14, 2022 | | Linux | thunderbird rocky 8 | 0:91.7.0-2.el8_5 | [RLSA-2022:0845](https://patchblox.com/security/data/fix/linux/rlsa-2022-0845.md) | Mar 14, 2022 | --- Data as of 2026-11-08T00:53:09Z UTC. 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