CVE catalog

CVE-2026-56788

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

[CVE catalog]

Severity: Medium · CVSS 4.8CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published: Jun 25, 2026, 6:13:15 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.17% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	rtklib	sid	`2.4.3.b34+dfsg-1`	vulnerable
Debian	rtklib	forky	`2.4.3.b34+dfsg-1`	vulnerable
Debian	rtklib	trixie	`2.4.3.b34+dfsg-1`	vulnerable
Debian	rtklib	bookworm	`2.4.3.b34+dfsg-1`	not affected
Cpe	rtklib	Not reported	Not reported	vulnerable
Cpe	rtklib	Not reported	Not reported	unknown
Cpe	rtklib	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	rtklib	source	sid	`(unfixed)`	not yet assigned	Not reported	[1140766]
Debian	rtklib	source	forky	`(unfixed)`	not yet assigned	Not reported	[1140766]
Debian	rtklib	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1140766]
Debian	rtklib	source	bookworm	`Not affected`	unimportant	Not reported	[1140766]

[Debian bug #1140766]

Notes

[trixie] rtklib: Minor issue

OpenFactory catalog packages

[Debian 13 (Trixie)]

[librtklib1]Affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b2 · amd64 · trixie
  Affected
  nvd · rtklib · debian · 13
- 2.4.3.b34+dfsg-1+b2 · arm64 · trixie
  Affected
  nvd · rtklib · debian · 13
[librtklib-dev]Affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b2 · amd64 · trixie
  Affected
  nvd · rtklib · debian · 13
- 2.4.3.b34+dfsg-1+b2 · arm64 · trixie
  Affected
  nvd · rtklib · debian · 13
[rtklib]Affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b2 · amd64 · trixie
  Affected
  nvd · rtklib · debian · 13
- 2.4.3.b34+dfsg-1+b2 · arm64 · trixie
  Affected
  nvd · rtklib · debian · 13
[rtklib-doc]Affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1 · all · trixie
  Affected
  nvd · rtklib · debian · 13
- 2.4.3.b34+dfsg-1 · all · trixie
  Affected
  nvd · rtklib · debian · 13
[rtklib-qt]Affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b2 · amd64 · trixie
  Affected
  nvd · rtklib · debian · 13
- 2.4.3.b34+dfsg-1+b2 · arm64 · trixie
  Affected
  nvd · rtklib · debian · 13

[Debian 12 (Bookworm)]

[librtklib1]Not affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b1 · amd64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
- 2.4.3.b34+dfsg-1+b1 · arm64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
[librtklib-dev]Not affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b1 · amd64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
- 2.4.3.b34+dfsg-1+b1 · arm64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
[rtklib]Not affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b1 · amd64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
- 2.4.3.b34+dfsg-1+b1 · arm64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
[rtklib-doc]Not affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1 · all · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
- 2.4.3.b34+dfsg-1 · all · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
[rtklib-qt]Not affected
Source package: [rtklib]
Details (2)
- 2.4.3.b34+dfsg-1+b1 · amd64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm
- 2.4.3.b34+dfsg-1+b1 · arm64 · bookworm
  Not affected
  nvd · rtklib · debian · bookworm

Observed: Oct 26, 2026, 2:09:23 AM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]