CLEANSTART-2024-RZ02688 Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78

🗓️ 31 Oct 2026 14:36:45Reported by GoogleType

osv_cleanstart🔗 osv.dev👁 7 Views

Memory safety bugs in Firefox and Firefox ESR.

Reporter	Title	Published	Views	Family All 199
IBM Security Bulletins	Security Bulletin: Multiple vulnerabilities of Mozilla Firefox (less than Firefox 78.5 ESR + CVE-2020-15683) have affected Synthetic Playback Agent 8.1.4.0-8.1.4 IF12 + ICAM2019.3.0 - 2020.2.0	25 Feb 202107:56	–	ibm
ALT Linux	Security fix for the ALT Linux 10 package firefox-esr version 78.4.0-alt1	20 Oct 202000:00	–	altlinux
ALT Linux	Security fix for the ALT Linux 10 package thunderbird version 78.4.0-alt1	22 Oct 202000:00	–	altlinux
Tenable Nessus	Amazon Linux 2 : thunderbird (ALAS-2020-1572)	9 Dec 202000:00	–	nessus
Tenable Nessus	CentOS 8 : firefox (CESA-2020:4317)	1 Feb 202100:00	–	nessus
Tenable Nessus	CentOS 8 : thunderbird (CESA-2020:4913)	1 Feb 202100:00	–	nessus
Tenable Nessus	CentOS 7 : firefox (RHSA-2020:4310)	6 Nov 202000:00	–	nessus
Tenable Nessus	CentOS 6 : firefox (RHSA-2020:4330)	9 Nov 202000:00	–	nessus
Tenable Nessus	CentOS 7 : thunderbird (RHSA-2020:4909)	6 Nov 202000:00	–	nessus
Tenable Nessus	CentOS 6 : thunderbird (RHSA-2020:4947)	9 Nov 202000:00	–	nessus

Source	Link
github	www.github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2024/CLEANSTART-2024-RZ02688.json
osv	www.osv.dev/vulnerability/CVE-2020-15683
nvd	www.nvd.nist.gov/vuln/detail/CVE-2020-15683

31 Oct 2026 16:02Current

8.2High risk

Vulners AI Score8.2

CVSS 3.19.8

EPSS0.02674

Firefox Firefox ESR memory safety bugs