{"id":"UBUNTU-CVE-2026-56786","details":"RTKLIB through 2.4.3 contains an out-of-bounds write vulnerability in decode_type1033 function that fails to clamp length counters to destination buffer size, allowing up to 191-byte overflow into fixed 64-byte descriptor fields. An attacker controlling an NTRIP or serial RTCM3 correction stream can craft a valid CRC-bearing type-1033 message to corrupt adjacent rtcm_t object members, potentially achieving arbitrary code execution or denial of service.","modified":"2026-06-29T23:19:15.872875276Z","published":"2026-06-25T19:16:00Z","upstream":["CVE-2026-56786"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56786"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-56786"},{"type":"REPORT","url":"https://github.com/tomojitakasu/RTKLIB/issues/799"}],"affected":[{"package":{"name":"rtklib","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3+dfsg1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"rtklib","binary_version":"2.4.3+dfsg1-1"},{"binary_version":"2.4.3+dfsg1-1","binary_name":"rtklib-qt"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}},{"package":{"name":"rtklib","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3+dfsg1-1","2.4.3+dfsg1-2.1","2.4.3+dfsg1-2.1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.3+dfsg1-2.1build1","binary_name":"rtklib"},{"binary_name":"rtklib-qt","binary_version":"2.4.3+dfsg1-2.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}},{"package":{"name":"rtklib","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3+dfsg1-2.1build1","2.4.3.b34+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librtklib1","binary_version":"2.4.3.b34+dfsg-1"},{"binary_version":"2.4.3.b34+dfsg-1","binary_name":"rtklib"},{"binary_name":"rtklib-qt","binary_version":"2.4.3.b34+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}},{"package":{"name":"rtklib","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3.b34+dfsg-1","2.4.3.b34+dfsg-1build1","2.4.3.b34+dfsg-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"librtklib1","binary_version":"2.4.3.b34+dfsg-1build2"},{"binary_name":"rtklib","binary_version":"2.4.3.b34+dfsg-1build2"},{"binary_name":"rtklib-qt","binary_version":"2.4.3.b34+dfsg-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}},{"package":{"name":"rtklib","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3.b34+dfsg-1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.3.b34+dfsg-1build2","binary_name":"librtklib1"},{"binary_name":"rtklib","binary_version":"2.4.3.b34+dfsg-1build2"},{"binary_name":"rtklib-qt","binary_version":"2.4.3.b34+dfsg-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}},{"package":{"name":"rtklib","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rtklib?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.3.b34+dfsg-1build2","2.4.3.b34+dfsg-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"librtklib1","binary_version":"2.4.3.b34+dfsg-1build3"},{"binary_name":"rtklib","binary_version":"2.4.3.b34+dfsg-1build3"},{"binary_name":"rtklib-qt","binary_version":"2.4.3.b34+dfsg-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56786.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}