Use After Free in Mozilla Firefox
CVE-2022-26486
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…
Vulnerability class: Use-After-Free
EPSS: 0.023 (81.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox_focus
- Mozilla Firefox For Android — versions unspecified
- Mozilla Focus — versions unspecified
- Mozilla Thunderbird — versions unspecified
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- security@mozilla.org (Exploit, Vendor Advisory)
- security@mozilla.org (Exploit, Issue Tracking, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2022-26486?
- CVE-2022-26486 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.6/10. Published 2022-12-22.
- How severe is CVE-2022-26486?
- Critical severity. CVSS v3 base score is 9.6 out of 10.
- Is CVE-2022-26486 known to be exploited?
- Yes. CVE-2022-26486 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-07), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.