CVE-2018-5094
A heap buffer overflow vulnerability may occur in WebAssembly when "shrinkElements" is called followed by garbage collection on memory that is now uninitialized.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.0%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
A heap buffer overflow vulnerability may occur in WebAssembly when "shrinkElements" is called followed by garbage collection on memory that is now uninitialized. This results in a potentially exploitable crash. This vulnerability affects Firefox < 58.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 14.96% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- mozilla/firefox · canonical/ubuntu linux
- Source
- security@mozilla.org
EPSS moved from 5.9% on 21 September 2026 to 15.0% on 27 October 2026, peaking at 15.3% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/102786Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1415883Issue Tracking, Permissions Required
- https://usn.ubuntu.com/3544-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-02/Vendor Advisory
- http://www.securityfocus.com/bid/102786Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1415883Issue Tracking, Permissions Required
- https://usn.ubuntu.com/3544-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-02/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.