CVE-2022-45409: mozilla firefox Use After Free
Vulnerability summary
CVE-2022-45409 is a high (CVSS 8.8) Use After Free vulnerability in mozilla firefox. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 56.2% of scored vulnerabilities.
Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 32 · Related 10Timeline
- 22-12-2022PublishedVulnerability first disclosed.
- 15-04-2025Last modifiedVulnerability information updated.
Description
The garbage collector could have been aborted in several states and zones and <code>GCRuntime::finishCollection</code> may not have been called, leading to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.79%
Chance of exploitation in the next 30 days
Percentile
56%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 0.77% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu6 products
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
- mozjs78All versions (No fix recorded)
- mozjs91All versions (No fix recorded)
Mozilla3 products
- firefox≥ unspecified, < 107 | < 107.0
- firefox esr≥ unspecified, < 102.5 | < 102.5
- thunderbird≥ unspecified, < 102.5 | < 102.5
Debian2 products
- firefox-esr< 102.5.0esr-1
- thunderbird< 1:102.5.0-1
Alpine1 product
- firefox-esr< 102.5.0-r0
4 vendors · 12 products
References
13 links- www.mozilla.org/security/advisories/mfsa2022-47/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-49/Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2022-48/Vendor Advisory
