CVE-2026-125400
Ettercap through 0.8.4.1 Use-After-Free via PCRE2 Filter Substitution
Ettercap through 0.8.4.1 contains a use-after-free vulnerability in func_pcre() in src/ec_filter.c that reads the PCRE2 ovector after freeing match data. Network-adjacent attackers can send packets matching a loaded pcre_regex() substitution filter to corrupt memory and potentially execute code as root.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| ettercap Ettercap Ettercap/ettercap
github |
≥ 0; ≤ 0.8.4.1 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 8.8 high |
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA: VulnCheck |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5CNA: VulnCheck · vendor-advisory
- https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98CNA: VulnCheck · patch
- https://github.com/Ettercap/ettercap/pull/1330CNA: VulnCheck · issue-tracking, patch
- https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitutionCNA: VulnCheck · third-party-advisory
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