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CVE-2021-43535

CVE-2021-43535

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.

CVSS 8.8 · High · EPSS 1.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • firefox

    Versions
    • ≥ unspecified, < 93: Affected (custom)

    Update to 93

  • thunderbird

    Versions
    • ≥ unspecified, < 91.3: Affected (custom)

    Update to 91.3

  • firefox esr

    Versions
    • ≥ unspecified, < 91.3: Affected (custom)

    Update to 91.3

  • firefox-esr Debian:12

    Affected ranges
    • ECOSYSTEM: < 91.3.0esr-1

    Update to 91.3.0esr-1

  • firefox-esr Debian:13

    Affected ranges
    • ECOSYSTEM: < 91.3.0esr-1

    Update to 91.3.0esr-1

  • firefox-esr Debian:14

    Affected ranges
    • ECOSYSTEM: < 91.3.0esr-1

    Update to 91.3.0esr-1

  • thunderbird Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:91.3.0-1

    Update to 1:91.3.0-1

  • thunderbird Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:91.3.0-1

    Update to 1:91.3.0-1

  • thunderbird Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:91.3.0-1

    Update to 1:91.3.0-1

  • thunderbird Ubuntu:18.04:LTS

    Versions
    • 1:52.4.0+build1-0ubuntu2
    • 1:52.6.0+build1-0ubuntu1
    • 1:52.7.0+build1-0ubuntu1
    • 1:52.8.0+build1-0ubuntu0.18.04.1
    • 1:52.9.1+build3-0ubuntu0.18.04.1
    • 1:60.2.1+build1-0ubuntu0.18.04.2
    • 1:60.4.0+build2-0ubuntu0.18.04.1
    • 1:60.5.1+build2-0ubuntu0.18.04.1
    • 1:60.6.1+build2-0ubuntu0.18.04.1
    • 1:60.7.0+build1-0ubuntu0.18.04.1
    • 1:60.7.1+build1-0ubuntu0.18.04.1
    • 1:60.7.2+build2-0ubuntu0.18.04.1
    • 1:60.8.0+build1-0ubuntu0.18.04.1
    • 1:60.9.0+build1-0ubuntu0.18.04.1
    • 1:68.2.1+build1-0ubuntu0.18.04.1
    • 1:68.2.2+build1-0ubuntu0.18.04.1
    • 1:68.4.1+build1-0ubuntu0.18.04.1
    • 1:68.7.0+build1-0ubuntu0.18.04.1
    • 1:68.8.0+build2-0ubuntu0.18.04.2
    • 1:68.10.0+build1-0ubuntu0.18.04.1
    • 1:78.8.1+build1-0ubuntu0.18.04.1
    • 1:78.11.0+build1-0ubuntu0.18.04.2
    • 1:78.13.0+build1-0ubuntu0.18.04.1
    • 1:78.14.0+build1-0ubuntu0.18.04.1
    • 1:78.14.0+build1-0ubuntu0.18.04.2
    Affected ranges
    • ECOSYSTEM: < 1:91.5.0+build1-0ubuntu0.18.04.1

    Update to 1:91.5.0+build1-0ubuntu0.18.04.1

  • thunderbird Ubuntu:20.04:LTS

    Versions
    • 1:68.1.2+build1-0ubuntu1
    • 1:68.1.2+build1-0ubuntu2
    • 1:68.2.1+build1-0ubuntu1
    • 1:68.2.2+build1-0ubuntu1
    • 1:68.3.0+build2-0ubuntu1
    • 1:68.3.1+build1-0ubuntu2
    • 1:68.4.1+build1-0ubuntu1
    • 1:68.4.2+build2-0ubuntu1
    • 1:68.5.0+build1-0ubuntu1
    • 1:68.6.0+build2-0ubuntu1
    • 1:68.7.0+build1-0ubuntu1
    • 1:68.7.0+build1-0ubuntu2
    • 1:68.8.0+build2-0ubuntu0.20.04.2
    • 1:68.10.0+build1-0ubuntu0.20.04.1
    • 1:78.7.1+build1-0ubuntu0.20.04.1
    • 1:78.8.1+build1-0ubuntu0.20.04.1
    • 1:78.11.0+build1-0ubuntu0.20.04.2
    • 1:78.13.0+build1-0ubuntu0.20.04.2
    • 1:78.14.0+build1-0ubuntu0.20.04.1
    • 1:78.14.0+build1-0ubuntu0.20.04.2
    Affected ranges
    • ECOSYSTEM: < 1:91.5.0+build1-0ubuntu0.20.04.1

    Update to 1:91.5.0+build1-0ubuntu0.20.04.1

Original sources

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