High 8.7Published Dec 22, 2025

CVE-2025-34457wb2osz/direwolf <= 1.8.1 Stack-based Buffer Overflow DoS

Updated under an hour ago (Oct 27, 2026, 3:10 AM ET)

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Every CVE for wb2osz Dire Wolf

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-121
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Mar 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

wb2osz Dire Wolf wb2osz:dire_wolf (from the name)	through 1.8.1; 694c95485b21c1c22bc4682703771dec4d7a374b not affected	CNA record

References

References

https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md	technical-description, exploit
https://github.com/wb2osz/direwolf/issues/617	issue-tracking
https://github.com/wb2osz/direwolf/commit/694c954	patch
https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.