🛡️ CVE-2026-56788 — rtklib

🟡 CVSS 4.4 — Medium ⚠️ Exploit Public CWE-125 NVD
4.4
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

RTKLIB through 2.4.3 contains an out-of-bounds read vulnerability in getcodepri function when processing unrecognized RINEX observation codes, allowing attackers to trigger denial of service. Crafted RINEX files with unknown observation types cause negative array indexing into the codepris table, resulting in reliable crashes and potential memory disclosure of adjacent global data.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability low.

Weakness class

CVE-2026-56788 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-56788 is recorded against 1 package.

  • rtklib (fixed in 2.4.3)

Timeline and source

Published on 25 June 2026 and last revised on 14 July 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com
www.vulncheck.com
github.com

Details

Severity MEDIUM
CVSS Score 4.4
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
CWE CWE-125
Public Exploit ⚠️ Yes
Source NVD
Published 2026-06-25
Updated 2026-08-11
Modified 2026-07-14
Fix URL N/A

Affected Packages

Software From version Fixed in
rtklib — 2.4.3

Similar Threats

Exploit Protection

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CVE-2026-56788 carries CVSS 4.4 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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