Out-of-bounds Read in Mozilla Firefox
CVE-2024-3854
In some code patterns the JIT incorrectly optimized switch statements and generated code with out-of-bounds-reads. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
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-2024-3854?
- CVE-2024-3854 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Read. CVSS score: 8.8/10. Published 2024-04-16.
- How severe is CVE-2024-3854?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2024-3854 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.