CVE-2019-9810
Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 27.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
Incorrect alias information in IonMonkey JIT compiler for Array.prototype.slice method may lead to missing bounds check and a buffer overflow. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 27.21% probability · 98th percentile
- Public exploits
- 2 in Exploit-DB · first 26 March 2019
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- mozilla/firefox · mozilla/thunderbird · redhat/enterprise linux · redhat/enterprise linux eus · redhat/enterprise linux server aus · redhat/enterprise linux server tus
- Source
- security@mozilla.org
EPSS moved from 27.2% on 22 October 2026 to 27.2% on 3 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.htmlExploit, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0966Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1144Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1537924Exploit, Issue Tracking, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-10/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-12/Vendor Advisory
- http://packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.htmlExploit, Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2019:0966Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1144Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1537924Exploit, Issue Tracking, Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-09/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-10/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-12/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.