High severity8.1NVD Advisory· Published Jul 23, 2019· Updated Jun 17, 2026
CVE-2019-9821
CVE-2019-9821
Description
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash. This vulnerability affects Firefox < 67.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <67.0
- (no CPE)range: < 67
- (no CPE)range: unspecified
- osv-coords3 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed
< 60.7.0-lp150.3.54.5+ 2 more
- (no CPE)range: < 60.7.0-lp150.3.54.5
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 128.5.1-1.1
Patches
Vulnerability mechanics
References
2- bugzilla.mozilla.org/show_bug.cginvdPermissions RequiredVendor Advisory
- www.mozilla.org/security/advisories/mfsa2019-13/nvdVendor Advisory
News mentions
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