23 Oct 2026 15:48:27 UTC
Hamlib: rigctld `send_raw` Stack Out-of-Bounds Write and Uninitialized Memory Disclosure
cve-program · CVE-2026-54634 · Published
CVE-2026-54634
Hamlib: rigctld `send_raw` Stack Out-of-Bounds Write and Uninitialized Memory Disclosure
CVSS 3.1 7.3 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-54634
PublishedHamlib is a ham radio control library for radios, rotators, and amplifiers. Prior to 4.7.2, the unauthenticated rigctld send_raw command on TCP port 4532 reaches rigctl_send_raw() in tests/rigctl_parse.c, which writes a NUL byte at buf[buf_len + 1] outside its 200-byte stack buffer, and rig_send_raw() in src/rig.c, which copies reply_len - 1 bytes instead of the actual nbytes received. A remote client can send the CR terminator with a short payload to trigger both flaws in one command under the default no-password configuration. The out-of-bounds write can crash the daemon or corrupt adjacent stack memory, while the oversized copy can return up to 198 bytes of uninitialized stack data to the client. This issue is fixed in version 4.7.2.
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