Vulnerability · Published Jan 7, 2021 · Assigned by mozilla
CVE-2020-26972
Critical 9.8
In plain English
A critical-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)1.3%top 29.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.21 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.22 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.23 | firefox | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.21 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.22 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.23 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Alpine:v3.24 | librewolf | 84.0.1-r0 | ALPINE-CVE-2020-26972 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2020-26972 |
Affected products (as reported)
References
- https://www.mozilla.org/security/advisories/mfsa2020-54/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1671382 x_refsource_MISC