CVE-2025-34457

HIGH EPSS 37.0%
Published Dec 22, 20256mo ago · Modified Jun 17, 20262w ago
8.7 CVSS 4.0
High
Find Similar
Published Dec 22, 2025 6mo ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
8.7
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
37.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

References 4

  • github.com https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md
  • github.com https://github.com/wb2osz/direwolf/commit/694c954
  • github.com https://github.com/wb2osz/direwolf/issues/617
  • vulncheck.com https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.