{"id":"CVE-2026-111732","title":"Out-of-bounds write when parsing AR Vendor Block requests","summary":"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-siz…","severity":"critical","cvss":9.3,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-787"],"vendor":"RT-Labs","product":"P-Net","affected":["P-Net < 1.0.3"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-11-05T21:21:27.474782Z"},"published":"2026-10-29","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:21:46.023Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111732","references":[{"url":"https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf","label":"Cybersecurity advisory for P-Net"}],"tags":["cve.org"],"epss":0.00404,"epssPercentile":0.34891,"ingestedAt":"2026-11-01T20:00:16.972Z","slug":"CVE-2026-111732","body":"## Overview\n\nP-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.\n\n## Affected\n\n- `P-Net < 1.0.3`\n\n## Remediation\n\nUpgrade to P-Net 1.0.3 or later.","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}