Description
wb2osz/direwolf (Dire Wolf) versions up to and including 1.8, prior to commit 3658a87, contain a reachable assertion vulnerability in the APRS MIC-E decoder function aprs_mic_e() located in src/decode_aprs.c. When processing a specially crafted AX.25 frame containing a MIC-E message with an empty or truncated comment field, the application triggers an unhandled assertion checking for a non-empty comment. This assertion failure causes immediate process termination, allowing a remote, unauthenticated attacker to cause a denial of service by sending malformed APRS traffic.
References (4)
Core 4
Core References
Various Sources technical-description
exploit
https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/wb2osz-direwolf-reachable-assertion-dos
Issue Tracking issue-tracking
https://github.com/wb2osz/direwolf/issues/618
Scores
CVSS v4
8.7
EPSS
0.0042
EPSS Percentile
33.6%
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
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-617
Status
published
Products (3)
wb2osz/Dire Wolf
< 1.8.1
wb2osz/Dire Wolf
3658a878920803bbb69a4567579dcc4d6cb80a92
wb2osz/Dire Wolf
commit 3658a87
Published
Dec 22, 2025
Tracked Since
Feb 18, 2026