Hamlib: rigctld `send_raw` Stack Out-of-Bounds Write and Uninitialized Memory Disclosure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54634
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 22:17:01 UTC
Updated2026-09-18 15:17:09 UTC
DescriptionHamlib 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.

Risk And Classification

Primary CVSS: v3.1 7.3 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.002510000 probability, percentile 0.168030000 (date 2026-09-20)

Problem Types: CWE-787 | CWE-908 | CWE-787 CWE-787: Out-of-bounds Write | CWE-908 CWE-908: Use of Uninitialized Resource

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Hamlib Hamlib affected < 4.7.2 Not specified

References

ReferenceSourceLinkTags
github.com/Hamlib/Hamlib/commit/587f7bb2c6442e36ed5b6021f6ee9951daf1576b [email protected] github.com
github.com/Hamlib/Hamlib/commit/3e3f78fc7732a4ce0da97b7a86d6d9fd9bd117c4 [email protected] github.com
github.com/Hamlib/Hamlib/commit/a3a7f00d759edadbe195d112dc89006ae8db146e [email protected] github.com
github.com/Hamlib/Hamlib/releases/tag/4.7.2 [email protected] github.com
github.com/Hamlib/Hamlib/security/advisories/GHSA-gpcq-c37x-pr46 [email protected] github.com
github.com/Hamlib/Hamlib/commit/47171005bf041f520bb134edf796b9f6fc27e6bf [email protected] github.com
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