High severity8.8CISA KEVNVD Advisory· Published Mar 2, 2020· Updated Jun 17, 2026
CVE-2019-17026
CVE-2019-17026
Description
Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
39cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 4 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <72.0.1
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <68.4.1
- (no CPE)range: <68.4.1
- (no CPE)range: unspecified
- (no CPE)range: unspecified
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <68.4.1
- (no CPE)range: <68.4.1
- (no CPE)range: unspecified
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
- osv-coords30 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%205pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP1
< 68.4.1-lp151.2.24.1+ 29 more
- (no CPE)range: < 68.4.1-lp151.2.24.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 68.4.1-lp151.2.22.2
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-3.66.1
- (no CPE)range: < 68.4.1-3.66.1
- (no CPE)range: < 68.4.1-78.57.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-109.101.1
- (no CPE)range: < 68.4.1-3.66.1
- (no CPE)range: < 68.4.1-3.66.1
Patches
Vulnerability mechanics
References
7- packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.htmlnvdExploitThird Party AdvisoryVDB Entry
- security.gentoo.org/glsa/202003-02nvdThird Party Advisory
- usn.ubuntu.com/4335-1/nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2020-03/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2020-04/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue Tracking
- www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource
News mentions
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