[ CVE-2022-26485 · Published 22 Dec 2022 ]
Mozilla Firefox Use-After-Free Vulnerability
Exploited · CISA KEV CVSS 8.8
EPSS 14%No fix listed yet
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-07
- EPSS: 14% chance of exploitation in the next 30 days (higher than 97% of CVEs)
[ Description ]Official description
Removing an XSLT parameter during processing could have lead to an exploitable use-after-free. 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.
CISA: Mozilla Firefox contains a use-after-free vulnerability in XSLT parameter processing which can be exploited to perform arbitrary code execution.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 21 Mar 2022): Apply updates per vendor instructions.
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- bugzilla.mozilla.org/show_bug.cgiExploitIssue TrackingVendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-09Vendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource