CVE-2020-26950
critical
CVSS v3
—
CVSS v2
—
VIR risk
9.5
Description
In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-26950
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-26950.html
Vendor advisory: arch — https://security.archlinux.org/ASA-202011-6
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 82.0.3-1 | |
| sles | affected | | |
| debian | sid | fixed | 82.0.3-1 |
| debian | bookworm | fixed | 78.4.1esr-1 |
| debian | bullseye | fixed | 78.4.1esr-1 |
| debian | forky | fixed | 78.4.1esr-1 |
| debian | trixie | fixed | 78.4.1esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.