{"id":"CVE-2025-34457","state":"PUBLISHED","title":"wb2osz/direwolf <= 1.8.1 Stack-based Buffer Overflow DoS","description":"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 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.","publishedAt":"2025-12-22T21:30:29.670Z","updatedAt":"2026-10-29T21:15:15.325Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["wb2osz Dire Wolf"],"affected":[{"vendor":"wb2osz","product":"Dire Wolf","packageName":"direwolf","packageURL":"pkg:github/wb2osz/direwolf","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.8.1","versionType":"semver"},{"version":"694c95485b21c1c22bc4682703771dec4d7a374b","status":"unaffected","versionType":"git"}],"repo":"https://github.com/wb2osz/direwolf"}],"references":["https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md","https://github.com/wb2osz/direwolf/issues/617","https://github.com/wb2osz/direwolf/commit/694c954","https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T23:08:31.977Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/34xxx/CVE-2025-34457.json","commit":"dc7676b3f67d6707e4927968546e7e0125ff7ec7","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-34457","state":"PUBLISHED","datePublished":"2025-12-22T21:30:29.670Z","dateUpdated":"2026-10-29T21:15:15.325Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2025-04-15T19:15:22.603Z"},"containers":{"cna":{"title":"wb2osz/direwolf <= 1.8.1 Stack-based Buffer Overflow DoS","descriptions":[{"lang":"en","value":"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. 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