CVE-2026-125400

EUVD-2026-120563
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
8.8 HIGH
ADJACENT_NETWORK
LOW
NONE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 16.13%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
ettercap-projectettercap
𝑥
≤ 0.8.4.1
CNA
Debian logo
Debian Releases
Debian Product
Codename
ettercap
bookworm
vulnerable
sid
vulnerable
trixie
vulnerable
Common Weakness Enumeration
References
https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625
https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98
https://github.com/Ettercap/ettercap/pull/1330
https://github.com/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5
https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitution