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Vulnerabilities / CVE-2020-26972

critical

CVE-2020-26972

The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that…

Published Modified CWE 416
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

Description

The lifecycle of IPC Actors allows managed actors to outlive their manager actors; and the former must ensure that they are not attempting to use a dead actor they have a reference to. Such a check was omitted in WebGL, resulting in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 84.

Affected packages and fixed versions

SourcePackageFixed in
alpine 3.12firefox84.0.1-r0
alpine 3.13firefox84.0.1-r0
alpine 3.14firefox84.0.1-r0
alpine 3.15firefox84.0.1-r0
alpine 3.16firefox84.0.1-r0
alpine 3.17firefox84.0.1-r0
alpine 3.18firefox84.0.1-r0
alpine 3.19firefox84.0.1-r0
alpine 3.20firefox84.0.1-r0
alpine 3.21firefox, librewolf84.0.1-r0
alpine 3.22firefox, librewolf84.0.1-r0
alpine 3.23firefox, librewolf84.0.1-r0
Show all 28 entries from 25 sources
SourcePackageFixed in
alpine 3.12firefox84.0.1-r0
alpine 3.13firefox84.0.1-r0
alpine 3.14firefox84.0.1-r0
alpine 3.15firefox84.0.1-r0
alpine 3.16firefox84.0.1-r0
alpine 3.17firefox84.0.1-r0
alpine 3.18firefox84.0.1-r0
alpine 3.19firefox84.0.1-r0
alpine 3.20firefox84.0.1-r0
alpine 3.21firefox84.0.1-r0
alpine 3.21librewolf84.0.1-r0
alpine 3.22firefox84.0.1-r0
alpine 3.22librewolf84.0.1-r0
alpine 3.23firefox84.0.1-r0
alpine 3.23librewolf84.0.1-r0
alpine 3.24librewolf84.0.1-r0
alpine edgelibrewolf84.0.1-r0
ubuntu 16.04firefox84.0+build3-0ubuntu0.16.04.1
ubuntu 18.04firefox84.0+build3-0ubuntu0.18.04.1
ubuntu 20.04firefox84.0+build3-0ubuntu0.20.04.1
ubuntu 20.10firefox84.0+build3-0ubuntu0.20.10.1
ubuntu 21.04firefox84.0+build3-0ubuntu2
ubuntu 21.10firefox84.0+build3-0ubuntu2
ubuntu 22.04firefox84.0+build3-0ubuntu2
ubuntu 22.10firefox84.0+build3-0ubuntu2
ubuntu 23.04firefox84.0+build3-0ubuntu2
ubuntu 23.10firefox84.0+build3-0ubuntu2
ubuntu 24.04firefox84.0+build3-0ubuntu2

References

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.