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NVD description
RTKLIB through 2.4.3 contains a heap buffer overflow vulnerability in the readrnxobsb function in src/rinex.c that allows attackers to trigger memory corruption by failing to clamp satellite count values from RINEX epoch headers. Attackers can craft malicious RINEX files declaring more than 64 satellites per epoch to cause heap buffer overflow writes and out-of-bounds stack reads, crashing RTKLIB-based applications including rnx2rtkp and RTKPOST.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-56789 Heap Buffer Overflow in RTKLIB Through 2.4.3 RINEX Processing https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-56789
Post summary
A new heap buffer overflow CVE (CVE‑2026‑56789) has been disclosed for RTKLIB RINEX processing, with no exploitation or patch information provided.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | rtklib | rtklib | - | - | - |