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CVE-2026-56788— RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri

Quick assessment

Affected
tomojitakasu RTKLIB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tomoji Takasu RTKLIB是日本Tomoji Takasu个人开发者的一个全球导航卫星系统标准与精确定位算法软件包。 Tomoji Takasu RTKLIB 2.4.3及之前版本存在缓冲区错误漏洞，该漏洞源于getcodepri函数在处理无法识别的RINEX观测码时存在越界读取，可能导致攻击者触发拒绝服务。

CVSS 4.4 · Medium EPSS 0.14% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
tomojitakasu RTKLIB ≤ 2.4.3 affected
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I. Basic Information for CVE-2026-56788

Vulnerability Information
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Vulnerability Title
RTKLIB 2.4.3 - Out-of-bounds Read via Negative Array Index in getcodepri
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Tomoji Takasu RTKLIB 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tomoji Takasu RTKLIB是日本Tomoji Takasu个人开发者的一个全球导航卫星系统标准与精确定位算法软件包。 Tomoji Takasu RTKLIB 2.4.3及之前版本存在缓冲区错误漏洞，该漏洞源于getcodepri函数在处理无法识别的RINEX观测码时存在越界读取，可能导致攻击者触发拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
tomojitakasu RTKLIB 0 ~ 2.4.3 -

II. Public POCs for CVE-2026-56788

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III. Intelligence Information for CVE-2026-56788

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Vendor Advisories for CVE-2026-56788 (1)

Proof of Concept for CVE-2026-56788 (1)

Same Patch Batch · tomojitakasu · 2026-06-25 · 4 CVEs total

CVE-2026-56786 9.8 CRITICAL RTKLIB 2.4.3 - Out-of-bounds Write in decode_type1033 via Crafted RTCM3 Message
CVE-2026-56789 6.5 MEDIUM RTKLIB 2.4.3 - Heap Buffer Overflow and Stack Read via Oversized RINEX Epoch Satellite Cou
CVE-2026-56787 6.5 MEDIUM RTKLIB 2.4.3 - Off-by-One Out-of-Bounds Read in decode_ssr3 via RTCM3 SSR Message

IV. Related Vulnerabilities

Same product: RTKLIB
Same vendor: tomojitakasu
Same weakness: CWE-125

V. Comments for CVE-2026-56788

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