CVE-2024-8394: mozilla thunderbird Use After Free
CVSS: 6.5v3.1MediumModified
AliasesDEBIAN-CVE-2024-8394
Published 06-09-2024Last modified 19-03-2025
Vulnerability summary
CVE-2024-8394 is a medium (CVSS 6.5) Use After Free vulnerability in mozilla thunderbird. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.8% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 9 · Related 2Timeline
- 06-09-2024PublishedVulnerability first disclosed.
- 19-03-2025Last modifiedVulnerability information updated.
Description
When aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 128.2.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.33%
Chance of exploitation in the next 30 days
Percentile
25%
Versus all other CVEs
30-day change
0.00 pp
From 0.33% on 20-09-2026
20-09-202620-10-2026
EPSS score0.33%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- thunderbird< 1:128.2.0esr-1
Mozilla1 product
- thunderbird≥ unspecified, < 128.2 | < 128.2.0
2 vendors · 2 products
References
3 links- www.mozilla.org/security/advisories/mfsa2024-43/Vendor Advisory
