{"id":"CVE-2026-111732","state":"PUBLISHED","title":"Out-of-bounds write when parsing AR Vendor Block requests","description":"P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution.\n\n\n\nThis option is disabled by default.","publishedAt":"2026-10-29T15:40:00.541Z","updatedAt":"2026-10-29T15:40:00.541Z","severity":{"score":9.3,"label":"Critical","version":"4.0","vector":"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","source":"rt-labs"},"assigner":"rt-labs","products":["RT-Labs P-Net"],"affected":[{"vendor":"RT-Labs","product":"P-Net","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.0.3","versionType":"semver"}]}],"references":["https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:10:33.477Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/111xxx/CVE-2026-111732.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-111732","state":"PUBLISHED","datePublished":"2026-10-29T15:40:00.541Z","dateUpdated":"2026-10-29T15:40:00.541Z","assignerShortName":"rt-labs","assignerOrgId":"4b71179a-3b92-4a9d-b9fc-af8b8ed579ee","dateReserved":"2026-10-16T15:49:47.302Z"},"containers":{"cna":{"title":"Out-of-bounds write when parsing AR Vendor Block requests","descriptions":[{"lang":"en","value":"P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution.\n\n\n\nThis option is disabled by default."}],"affected":[{"vendor":"RT-Labs","product":"P-Net","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.0.3","versionType":"semver"}]}],"references":[{"url":"https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf","name":"Cybersecurity advisory for P-Net"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9.3,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"rt-labs","orgId":"4b71179a-3b92-4a9d-b9fc-af8b8ed579ee","dateUpdated":"2026-10-29T15:40:00.541Z"},"solutions":[{"lang":"en","value":"Upgrade to P-Net 1.0.3 or later.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Upgrade to P-Net 1.0.3 or later.</p>"}]}],"credits":[{"lang":"en","value":"f0rw4rd (quellsec.dev)","type":"finder"}],"source":{"discovery":"UNKNOWN"}}}}}