{"id":"CVE-2026-74507","summary":"Bluetooth: HIDP: validate numbered report payloads","details":"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 skb-\u003edata[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.","modified":"2026-08-21T03:30:21.495614439Z","published":"2026-08-15T12:27:30.683Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74507.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/011bf4350d941f1995b2bd4b815ee206cacf2b8e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/27cc0e603355c585f1e5da8398faa4d36d498188"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34f53d27b81a16a02828c8fdfa4e02badc326f17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/689d8bb7fee96b7196b572b015b6055c6616ce0c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e7162427659b70ea17cd41b1f79e2e64c246690"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9c841f59e10b5d75c398a3fc6b2da448d2a2276b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7ad105d46acd828e424454815e4cd31069e047a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c73beb320f5705e508bf7d385b8cc5ef8d9c8b69"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74507.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74507"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0ff1731a1ae51e8e48cd559d70db536281c47f8e"},{"fixed":"011bf4350d941f1995b2bd4b815ee206cacf2b8e"},{"fixed":"689d8bb7fee96b7196b572b015b6055c6616ce0c"},{"fixed":"c73beb320f5705e508bf7d385b8cc5ef8d9c8b69"},{"fixed":"b7ad105d46acd828e424454815e4cd31069e047a"},{"fixed":"7e7162427659b70ea17cd41b1f79e2e64c246690"},{"fixed":"27cc0e603355c585f1e5da8398faa4d36d498188"},{"fixed":"9c841f59e10b5d75c398a3fc6b2da448d2a2276b"},{"fixed":"34f53d27b81a16a02828c8fdfa4e02badc326f17"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74507.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.39"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74507.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N"}]}