What’s Vulnerable › Vulnerabilities

CVE-2025-34458: wb2osz/direwolf <= 1.8.1 Reachable Assertion DoS

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-22 · updated 2026-10-29
• Weakness: CWE-617

Description

wb2osz/direwolf (Dire Wolf) versions up to and including 1.8.1, 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.

Affected products

• wb2osz Dire Wolf: through 1.8.1

References

• https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-010-direwolf-stack-buffer-overflow-kiss-frame.md
• https://github.com/wb2osz/direwolf/commit/3658a87
• https://github.com/wb2osz/direwolf/issues/618
• https://www.vulncheck.com/advisories/wb2osz-direwolf-reachable-assertion-dos

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