{"id":"CVE-2025-34457","summary":"wb2osz/direwolf \u003c= 1.8.1 Stack-based Buffer Overflow DoS","details":"wb2osz/direwolf (Dire Wolf) versions up to and including 1.8, prior to commit 694c954, contain a stack-based buffer overflow vulnerability in the function kiss_rec_byte() located in src/kiss_frame.c. When processing crafted KISS frames that reach the maximum allowed frame length (MAX_KISS_LEN), the function appends a terminating FEND byte without reserving sufficient space in the stack buffer. This results in an out-of-bounds write followed by an out-of-bounds read during the subsequent call to kiss_unwrap(), leading to stack memory corruption or application crashes. This vulnerability may allow remote unauthenticated attackers to trigger a denial-of-service condition.","modified":"2026-08-12T03:51:27.422929255Z","published":"2025-12-22T21:30:29.670Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-121"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/34xxx/CVE-2025-34457.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/34xxx/CVE-2025-34457.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-34457"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos"},{"type":"REPORT","url":"https://github.com/wb2osz/direwolf/issues/617"},{"type":"FIX","url":"https://github.com/wb2osz/direwolf/commit/694c954"},{"type":"PACKAGE","url":"https://github.com/wb2osz/direwolf"},{"type":"EVIDENCE","url":"https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wb2osz/direwolf","events":[{"introduced":"0"},{"fixed":"694c954"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"last_affected":"1.8.1"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-34457.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}