| Name | CVE-2026-56789 |
| 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. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1140766 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rtklib (PTS) | bullseye | 2.4.3+dfsg1-2.1 | vulnerable |
| forky, sid, bookworm, trixie | 2.4.3.b34+dfsg-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| rtklib | source | (unstable) | (unfixed) | | | 1140766 |
Notes
[trixie] - rtklib <no-dsa> (Minor issue)
[bookworm] - rtklib <postponed> (Minor issue; unclamped RINEX epoch satellite count leads to out-of-bounds access in readrnxobsb, requires processing an attacker-supplied RINEX observation file)
[bullseye] - rtklib <postponed> (Minor issue; unclamped RINEX epoch satellite count leads to out-of-bounds access in readrnxobsb, requires processing an attacker-supplied RINEX observation file)
https://github.com/tomojitakasu/RTKLIB/issues/796