{"id":"CVE-2025-34457","title":"wb2osz/direwolf <= 1.8.1 Stack-based Buffer Overflow DoS","summary":"wb2osz/direwolf (Dire Wolf) versions up to and including 1.8.1, 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…","severity":"high","cvss":8.7,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-121"],"vendor":"wb2osz","product":"direwolf","affected":["direwolf <= 1.8.1"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2025-12-22T21:53:46.294245Z"},"published":"2025-12-22","updated":"2026-10-29","sourceUpdated":"2026-10-29T21:15:15.325Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-34457","references":[{"url":"https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md"},{"url":"https://github.com/wb2osz/direwolf/issues/617"},{"url":"https://github.com/wb2osz/direwolf/commit/694c954"},{"url":"https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos"}],"tags":["cve.org"],"epss":0.00509,"epssPercentile":0.43434,"ingestedAt":"2026-11-03T08:39:35.537Z","slug":"CVE-2025-34457","body":"## Overview\n\nwb2osz/direwolf (Dire Wolf) versions up to and including 1.8.1, 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.\n\n## Affected\n\n- `direwolf <= 1.8.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}