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CVE-2024-7527
Unexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR…
High8.8EPSS 0.61%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
Unexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.
Timeline
ID reserved
By mozilla
- 1 day later
· 1 day later
Published
- 7 months later
· 7 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 |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| 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)
- 0.61% · top 51% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
- Use-after-free in JavaScript garbage collection
- CWE-416 Use After Free (opens in a new tab)All about CWE-416 and its CVEs
Affected products
- affected unspecified – < 129
- affected unspecified – < 115.14
- affected unspecified – < 128.1
- affected unspecified – < 128.1
- affected unspecified – < 115.14
References (6)
- https://bugzilla.mozilla.org/show_bug.cgi?id=1871303 (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2024-33/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2024-34/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2024-35/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2024-37/ (opens in a new tab)
- https://www.mozilla.org/security/advisories/mfsa2024-38/ (opens in a new tab)
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-2024-7527)Record last updated .