High
rtklib — security advisory
RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.
- Products
- rtklib
- Affected versions
- 2.4.3+dfsg1-1, 2.4.3+dfsg1-2.1, 2.4.3+dfsg1-2.1build1, 2.4.3.b34+dfsg-1, 2.4.3.b34+dfsg-1build1, 2.4.3.b34+dfsg-1build2, 2.4.3.b34+dfsg-1build3
- Fixed versions
- Not specified
- CVEs
- CVE-2026-56787
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:47 UTC · Revision 1
Source evidence
RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.
osv:UBUNTU-CVE-2026-56787
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
rtklib
Fixed versions: Not specified
Complete source record
{
"id": "6716191a0c883420a748681c76265c50442f77fa4b1fb722fd5759b085957d4e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-56787",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-56787",
"summary": "RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.",
"evidence": "osv:UBUNTU-CVE-2026-56787",
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"modified": "2026-10-17T12:59:10.489991122Z",
"provider": "osv",
"upstream": [
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"references": [
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"https://www.cve.org/CVERecord?id=CVE-2026-56787",
"https://github.com/tomojitakasu/RTKLIB/issues/798"
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"source_id": "core-osv",
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"published_at": "2026-06-25T19:16:00+00:00"
}