Ettercap through 0.8.4.1 contains a use-after-free vulnerability in funcpcre() in src/ecfilter.c that reads the PCRE2 ovector after freeing…
CVE-2026-125400
Ettercap through 0.8.4.1 contains a use-after-free vulnerability in funcpcre() in src/ecfilter.c that reads the PCRE2 ovector after freeing match data. Network-adjacent attackers can send packets matching a loaded pcreregex() substitution filter to corrupt memory and potentially execute code as root.
Assessment
- CVSS
- 8.7 (v4.0)
- Severity
- High
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 9 November 2026
- Last updated
- 10 November 2026
- Assigner
- VulnCheck
CVSS vectorCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
At the source
References
- https://github.com/Ettercap/ettercap/security/advisories/GHSA-f3j5-rhhr-85j5
- https://github.com/Ettercap/ettercap/commit/1d8badb713579419a29a494bb463a1af59707e98
- https://github.com/Ettercap/ettercap/pull/1330
- https://github.com/Ettercap/ettercap/blob/v0.8.4.1/src/ec_filter.c#L593-L625
- https://www.vulncheck.com/advisories/ettercap-through-0.8.4.1-use-after-free-via-pcre2-filter-substitution
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