CVE-2025-34457
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.
INFO
Published Date :
Dec. 22, 2025, 10:16 p.m.
Last Modified :
Oct. 29, 2026, 9:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-34457
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Dire Wolf to a version after commit 694c954.
- Apply vendor-provided security patches.
- Review and validate code for buffer overflow issues.
- Implement strict input validation for KISS frames.
Public PoC/Exploit Available at Github
CVE-2025-34457 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-34457.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-34457 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-34457
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Security advisories and vulnerabilities discovered by Marlink Cyber
C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-34457 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-34457 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Oct. 29, 2026
Action Type Old Value New Value Changed 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. 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. Added Reference https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md Added Reference https://github.com/wb2osz/direwolf/commit/694c954 Added Reference https://github.com/wb2osz/direwolf/issues/617 Added Reference https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos Removed Reference https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md Removed Reference https://github.com/wb2osz/direwolf/commit/694c954 Removed Reference https://github.com/wb2osz/direwolf/issues/617 Removed Reference https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos -
CVE Translated by [email protected]
Oct. 19, 2026
Action Type Old Value New Value Added Translation Title: Dire Wolf de wb2osz, Description: wb2osz/direwolf (Dire Wolf) versiones hasta e incluyendo 1.8, versiones anteriores al commit 694c954, contienen una vulnerabilidad de desbordamiento de búfer basado en pila en la función kiss_rec_byte() ubicada en src/kiss_frame.c. Al procesar tramas KISS manipuladas que alcanzan la longitud máxima de trama permitida (MAX_KISS_LEN), la función añade un byte FEND de terminación sin reservar espacio suficiente en el búfer de pila. Esto resulta en una escritura fuera de límites seguida de una lectura fuera de límites durante la llamada subsiguiente a kiss_unwrap(), lo que lleva a corrupción de memoria de pila o bloqueos de la aplicación. Esta vulnerabilidad puede permitir a atacantes remotos no autenticados desencadenar una condición de denegación de servicio. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/wb2osz/direwolf', 'vendor': 'wb2osz', 'product': 'Dire Wolf', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '1.8.1'}, {'status': 'unaffected', 'version': '694c95485b21c1c22bc4682703771dec4d7a374b', 'versionType': 'git'}], 'packageURL': 'pkg:github/wb2osz/direwolf', 'packageName': 'direwolf', 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-34457', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2025-12-22T21:53:46.294245Z'} -
New CVE Received by [email protected]
Dec. 22, 2025
Action Type Old Value New Value Added 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. Added CVSS V4.0 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 Added CWE CWE-121 Added Reference https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md Added Reference https://github.com/wb2osz/direwolf/commit/694c954 Added Reference https://github.com/wb2osz/direwolf/issues/617 Added Reference https://www.vulncheck.com/advisories/wb2osz-direwolf-stack-based-buffer-overflow-dos