CVE-2023-6864
Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. Some of these bugs showed evidence of memory…
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
Memory safety bugs present in Firefox 120, Firefox ESR 115.5, and Thunderbird 115.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.
Timeline
ID reserved
By mozilla
- 4 days later
· 4 days later
Published
- 8 months later
· 8 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 32% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
- Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6
- CWE-787 (opens in a new tab)All about CWE-787 and its CVEs
Affected products
- affected unspecified – < 115.6
- affected unspecified – < 115.6
- affected unspecified – < 121
References (9)
- Memory safety bugs fixed in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6 (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html (opens in a new tab)x_transferred
- https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html (opens in a new tab)x_transferred
- https://security.gentoo.org/glsa/202401-10 (opens in a new tab)x_transferred
- https://www.debian.org/security/2023/dsa-5581 (opens in a new tab)x_transferred
- https://www.debian.org/security/2023/dsa-5582 (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-54/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-55/ (opens in a new tab)x_transferred
- https://www.mozilla.org/security/advisories/mfsa2023-56/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-6864)Record last updated .