Description
C-Kermit before 11.1.515 contains a heap buffer overflow vulnerability in putsrv() in ckcfns.c that allows malicious peers to write past the srvcmd buffer by sending crafted packets. Attackers can use Kermit repeat-count compression in server command, GET, or file-header packets to write attacker-chosen bytes beyond the heap buffer on servers or receiving instances.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-129126 ↗
- github.com/OpenKermit/ckermit/blob/v11.0.514/ckcfns.c ↗
- github.com/OpenKermit/ckermit/commit/37e54720779237897bc6887efac42fe138817897 ↗
- github.com/OpenKermit/ckermit/releases/tag/v11.1.515 ↗
- github.com/OpenKermit/ckermit/security/advisories/GHSA-c5px-7h4c-gj8p ↗
- www.vulncheck.com/advisories/c-kermit-before-11.1.515-heap-buffer-overflow-via-putsrv-packet-decoding ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.