{"id":"CVE-2026-74507","title":"Bluetooth: HIDP: validate numbered report payloads","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: HIDP: validate numbered report payloads\n\nWhen hidp_get_raw_report() waits for a numbered report,\nhidp_process_data() compares the expected report number with…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 011bf4350d941f1995b2bd4b815ee206cacf2b8e","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 689d8bb7fee96b7196b572b015b6055c6616ce0c","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < c73beb320f5705e508bf7d385b8cc5ef8d9c8b69","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < b7ad105d46acd828e424454815e4cd31069e047a","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 7e7162427659b70ea17cd41b1f79e2e64c246690","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 27cc0e603355c585f1e5da8398faa4d36d498188","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 9c841f59e10b5d75c398a3fc6b2da448d2a2276b","Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 34f53d27b81a16a02828c8fdfa4e02badc326f17","Linux 2.6.39"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T18:58:31.395135Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:51.043Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74507","references":[{"url":"https://git.kernel.org/stable/c/011bf4350d941f1995b2bd4b815ee206cacf2b8e"},{"url":"https://git.kernel.org/stable/c/689d8bb7fee96b7196b572b015b6055c6616ce0c"},{"url":"https://git.kernel.org/stable/c/c73beb320f5705e508bf7d385b8cc5ef8d9c8b69"},{"url":"https://git.kernel.org/stable/c/b7ad105d46acd828e424454815e4cd31069e047a"},{"url":"https://git.kernel.org/stable/c/7e7162427659b70ea17cd41b1f79e2e64c246690"},{"url":"https://git.kernel.org/stable/c/27cc0e603355c585f1e5da8398faa4d36d498188"},{"url":"https://git.kernel.org/stable/c/9c841f59e10b5d75c398a3fc6b2da448d2a2276b"},{"url":"https://git.kernel.org/stable/c/34f53d27b81a16a02828c8fdfa4e02badc326f17"}],"tags":["cve.org"],"epss":0.00242,"epssPercentile":0.14331,"ingestedAt":"2026-10-16T19:46:24.352Z","slug":"CVE-2026-74507","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: HIDP: validate numbered report payloads\n\nWhen hidp_get_raw_report() waits for a numbered report,\nhidp_process_data() compares the expected report number with skb->data[0].\nA connected HIDP peer can reply with only a DATA transaction header,\nleaving the skb empty after the header is removed.\n\nKMSAN reports an uninitialized-value use in hidp_session_run(), with the\nvalue originating in __alloc_skb() through vhci_write(). The transaction\nheader checks remove the empty-frame reports, but this report remains until\nthe payload check is added.\n\nThe comparison can also consume a peer-controlled byte beyond the declared\nL2CAP PDU. A DATA | FEATURE response followed by an extra 0x01 byte made\nthe current code accept that byte as report ID 1 and complete\nHIDIOCGFEATURE with a zero-byte result. With this change the malformed\nresponse is rejected with -EIO, while a subsequent valid response still\nsucceeds.\n\nRequire a payload byte before comparing a numbered report ID. Unnumbered\nreports continue to accept an empty payload.\n\n## Affected\n\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 011bf4350d941f1995b2bd4b815ee206cacf2b8e`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 689d8bb7fee96b7196b572b015b6055c6616ce0c`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < c73beb320f5705e508bf7d385b8cc5ef8d9c8b69`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < b7ad105d46acd828e424454815e4cd31069e047a`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 7e7162427659b70ea17cd41b1f79e2e64c246690`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 27cc0e603355c585f1e5da8398faa4d36d498188`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 9c841f59e10b5d75c398a3fc6b2da448d2a2276b`\n- `Linux >= 0ff1731a1ae51e8e48cd559d70db536281c47f8e < 34f53d27b81a16a02828c8fdfa4e02badc326f17`\n- `Linux 2.6.39`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}