Mozilla Firefox Use-After-Free Vulnerability (CVE-2022-26486)
Mozilla Firefox contains a use-after-free vulnerability in WebGPU IPC Framework which can be exploited to perform arbitrary code execution.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2022-03-21 under CISA BOD 22-01.
This is a Use After Free (CWE-416) vulnerability in Mozilla Firefox. 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. Exploitation requires remote network access, low attack complexity, no authentication required, and user interaction required.
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Phishing link
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Malicious file
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Server compromised
Probably yes if any of these apply:
Active exploitation documented in the wild. Threat-research write-up: https://bugzilla.mozilla.org/show_bug.cgi?id=1758070
Get the fix
Apply the fixed package from your vendor. The advisory lists affected versions and the exact fixed build.
↗ Vendor advisoryManual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply updates per vendor instructions.
References
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References