Home/CVE/Mozilla Firefox Use-After-Free Vulnerability
CVE

CVE-2022-26486

Mozilla Firefox Use-After-Free Vulnerability

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 < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

CRITICAL · CVSS 9.6 ⚠ CISA KEV EPSS 0.02529
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
⬢

Required Remediation

Apply updates per vendor instructions.

⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
▤

Affected Products & Versions

5
mozilla firefox< 91.6.1
mozilla firefox< 97.0.2
mozilla firefox< 97.3.0
mozilla firefox focus< 97.3.0
mozilla thunderbird< 91.6.2
⚠

Public Exploits & PoCs

2
pocbugzilla.mozilla.org · show_bug.cgi?id=1758070bugzilla.mozilla.org
pocwww.mozilla.org · mfsa2022-09www.mozilla.org
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

9.6
CRITICAL · CVSS v3.1 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Dec 2022 · 08:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

21
suse-csafopenSUSE-SU-2024:11909-1
suse-csafSUSE-SU-2022:14906-1
suse-csafopenSUSE-SU-2022:0804-1
suse-csafSUSE-SU-2022:0804-1
suse-csafopenSUSE-SU-2022:0783-1
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-26486US Government Resource
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