CVE-2026-117609: rtl_433 through 25.12 Stack-Based Buffer Overflow via Proflame 2 Decoder

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-28 · updated 2026-10-28
Weakness: CWE-121

Description

rtl_433 through 25.12 contains a stack-based buffer overflow vulnerability in proflame2_mc() that allows nearby attackers to write past a 7-byte stack buffer by sending more than seven valid Manchester-coded words. Attackers can transmit a crafted OOK radio signal or supply a crafted signal file to crash rtl_433 and corrupt stack memory, enabling control-flow hijacking on builds without stack canaries.

Affected products

merbanan rtl_433: from 21.12 through 25.12

References

https://github.com/merbanan/rtl_433
https://github.com/merbanan/rtl_433/blob/25.12/src/devices/proflame2.c#L46-L95
https://github.com/merbanan/rtl_433/commit/f35183aaf1d2d905d422fd70bcae4eb7349d6186
https://github.com/merbanan/rtl_433/issues/3739
https://github.com/merbanan/rtl_433/pull/3740
https://www.vulncheck.com/advisories/rtl-433-through-25.12-stack-based-buffer-overflow-via-proflame-2-decoder

Get alerted when CVE-2026-117609 or the next vulnerability affects your stack