{"id":"CVE-2026-42804","state":"PUBLISHED","title":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI360 SensorAPI(C-Library) in versions up to and including commit d6b200416a.\r","description":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI360 SensorAPI(C-Library) in versions up to and including commit d6b200416a.\r\n\r\nThe vulnerability is located within the FIFO parsing and debug logging subsystem inside the function bhi360_parse_debug_message() in bhi360_parse.c (lines 1852-1875). \r\n\r\nThe parser trusts the first payload byte of a debug frame as the message length (msg_length) and copies that many bytes into a fixed-size 17-byte stack buffer (debug_msg) via memcpy without performing any bounds checking.\r\n\r\nA locally or physically positioned attacker (e.g., via a malicious sensor, counterfeit hardware module, or a Man-in-the-Middle on the communication bus) can exploit this vulnerability by injecting a crafted debug frame with a length byte exceeding 16.\r\n\r\nThis corrupts adjacent stack data, including the saved return address.\r\n\r\nFurthermore, because the overflowed buffer is subsequently passed to a printf-style logging sink, the attacker can supply format string specifiers (e.g., %n) to execute arbitrary code on the host microcontroller/SoC or cause a reliable system crash (Denial of Service).","publishedAt":"2026-09-10T08:56:14.315Z","updatedAt":"2026-09-10T15:01:55.301Z","severity":{"score":7.6,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","source":"bosch"},"assigner":"bosch","products":["Bosch Sensortec BHI360_SensorAPI (C-Library)"],"affected":[{"vendor":"Bosch Sensortec","product":"BHI360_SensorAPI (C-Library)","versions":[{"version":"2.1.0","status":"affected","lessThanOrEqual":"2.2.0","versionType":"custom"}]}],"references":["https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/42xxx/CVE-2026-42804.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-42804","state":"PUBLISHED","datePublished":"2026-09-10T08:56:14.315Z","dateUpdated":"2026-09-10T15:01:55.301Z","assignerShortName":"bosch","assignerOrgId":"c95f66b2-7e7c-41c5-8f09-6f86ec68659c","dateReserved":"2026-04-30T08:03:11.875Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A stack-based buffer overflow vulnerability exists in the Bosch Sensortec BHI360 SensorAPI(C-Library) in versions up to and including commit d6b200416a.\r\n\r\nThe vulnerability is located within the FIFO parsing and debug logging subsystem inside the function bhi360_parse_debug_message() in bhi360_parse.c (lines 1852-1875). \r\n\r\nThe parser trusts the first payload byte of a debug frame as the message length (msg_length) and copies that many bytes into a fixed-size 17-byte stack buffer (debug_msg) via memcpy without performing any bounds checking.\r\n\r\nA locally or physically positioned attacker (e.g., via a malicious sensor, counterfeit hardware module, or a Man-in-the-Middle on the communication bus) can exploit this vulnerability by injecting a crafted debug frame with a length byte exceeding 16.\r\n\r\nThis corrupts adjacent stack data, including the saved return address.\r\n\r\nFurthermore, because the overflowed buffer is subsequently passed to a printf-style logging sink, the attacker can supply format string specifiers (e.g., %n) to execute arbitrary code on the host microcontroller/SoC or cause a reliable system crash (Denial of Service)."}],"affected":[{"vendor":"Bosch Sensortec","product":"BHI360_SensorAPI (C-Library)","versions":[{"version":"2.1.0","status":"affected","lessThanOrEqual":"2.2.0","versionType":"custom"}]}],"references":[{"url":"https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html","name":"https://psirt.bosch.com/security-advisories/BOSCH-SA-223618.html","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","attackVector":"PHYSICAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.6,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en-US","description":"CWE-121 Stack-based Buffer Overflow"}]}],"providerMetadata":{"shortName":"bosch","orgId":"c95f66b2-7e7c-41c5-8f09-6f86ec68659c","dateUpdated":"2026-09-10T08:56:14.315Z"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-10T15:01:43.170911Z","id":"CVE-2026-42804","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-10T15:01:55.301Z"}}]}}}