What’s Vulnerable › Vulnerabilities

CVE-2025-34450: merbanan/rtl_433 <= 25.02 Stack-based Buffer Overflow

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-12-18 · updated 2026-06-17
• Weakness: CWE-121

Description

merbanan/rtl_433 versions up to and including 25.02 and prior to commit 25e47f8 contain a stack-based buffer overflow vulnerability in the function parse_rfraw() located in src/rfraw.c. When processing crafted or excessively large raw RF input data, the application may write beyond the bounds of a stack buffer, resulting in memory corruption or a crash. This vulnerability can be exploited to cause a denial of service and, under certain conditions, may be leveraged for further exploitation depending on the execution environment and available mitigations.

Affected products

• merbanan rtl_433: through 25.02

References

• https://github.com/dd32/rtl_433/commit/25e47f8
• https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-004-rtl_433-rfraw-parse-overflow.md
• https://github.com/merbanan/rtl_433/issues/3375
• https://www.vulncheck.com/advisories/merbanan-rtl-433-stack-based-buffer-overflow
• https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2025-004-rtl_433-rfraw-parse-overflow.md

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