{"id":"CVE-2026-7762","state":"PUBLISHED","title":"Heap buffer overflow in dot11ah.ko S1G Capabilities IE processing","description":"A heap-based buffer overflow vulnerability in the dot11ah.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon or probe response frame containing a malformed S1G Capabilities Information Element (IE element ID 0xD9). The function morse_dot11ah_find_s1g_caps_for_bssid() uses the IE length field directly as the size argument to memcpy without validating it against the 15-byte destination buffer. An attacker can supply up to 255 bytes, causing an overflow of up to 240 bytes of attacker-controlled data into adjacent kernel heap memory. The vulnerability is triggerable during normal scanning without authentication, association, or user interaction.","publishedAt":"2026-06-05T01:36:20.993Z","updatedAt":"2026-06-05T20:19:29.920Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Bugcrowd","products":["Morse Micro HaLowLink 2"],"affected":[{"vendor":"Morse Micro","product":"HaLowLink 2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.11.13","versionType":"semver"}]}],"references":["https://www.morsemicro.com/security-advisories/MM-SA-2026-002"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/7xxx/CVE-2026-7762.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-7762","state":"PUBLISHED","datePublished":"2026-06-05T01:36:20.993Z","dateUpdated":"2026-06-05T20:19:29.920Z","assignerShortName":"Bugcrowd","assignerOrgId":"4ac701fe-44e9-4bcd-9585-dd6449257611","dateReserved":"2026-05-04T05:02:07.918Z"},"containers":{"cna":{"title":"Heap buffer overflow in dot11ah.ko S1G Capabilities IE processing","descriptions":[{"lang":"en","value":"A heap-based buffer overflow vulnerability in the dot11ah.ko HaLow Wi-Fi kernel driver in Morse Micro HaLowLink 2 software versions prior to 2.11.13 allows an unauthenticated attacker within radio range to cause a Denial of Service (kernel panic) or potentially achieve Remote Code Execution via a crafted 802.11ah beacon or probe response frame containing a malformed S1G Capabilities Information Element (IE element ID 0xD9). The function morse_dot11ah_find_s1g_caps_for_bssid() uses the IE length field directly as the size argument to memcpy without validating it against the 15-byte destination buffer. An attacker can supply up to 255 bytes, causing an overflow of up to 240 bytes of attacker-controlled data into adjacent kernel heap memory. The vulnerability is triggerable during normal scanning without authentication, association, or user interaction."}],"affected":[{"vendor":"Morse Micro","product":"HaLowLink 2","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.11.13","versionType":"semver"}]}],"references":[{"url":"https://www.morsemicro.com/security-advisories/MM-SA-2026-002"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-122 Heap-based Buffer Overflow"}]}],"providerMetadata":{"shortName":"Bugcrowd","orgId":"4ac701fe-44e9-4bcd-9585-dd6449257611","dateUpdated":"2026-06-05T01:36:20.993Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:morsemicro:halow_link_2:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"2.11.13"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-06-05T20:19:09.789917Z","id":"CVE-2026-7762","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-05T20:19:29.920Z"}}]}}}