Use After Free in Mozilla Firefox
CVE-2024-3861
If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (12.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
- lists.debian.org/debian-lts-announce/2024/04/msg00012.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2024/04/msg00013.html (Mailing List, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2024-18/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-19/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2024-20/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-3861?
- CVE-2024-3861 is a medium-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 4.0/10. Published 2024-04-16.
- How severe is CVE-2024-3861?
- Medium severity. CVSS v3 base score is 4.0 out of 10.
- Is CVE-2024-3861 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.