CVE-2026-125400

Description

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.

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