{"schema":"threatline.record/2","record":{"id":"CVE-2026-98601","aliases":[],"summary":"Bluetooth: btintel_pcie: validate device-supplied DMA indices","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btintel_pcie: validate device-supplied DMA indices\n\nIn btintel_pcie_msix_rx_handle(), the driver processes RX completion\ndescriptors (urbd1) written by the PCIe device into DMA-coherent memory.\nurbd1->frbd_tag (a 16-bit field fully controlled by the device firmware\nvia DMA) is used directly as an array index into rxq->bufs[] without any\nbounds check. rxq->bufs[] has only BTINTEL_PCIE_RX_DESCS_COUNT (64)\nentries, while frbd_tag can be any value 0-65535. A malicious or\nmalfunctioning device can write an out-of-range frbd_tag, causing the\ndriver to dereference an out-of-bounds data_buf pointer.\n\nAdditionally, cr_hia is read from a DMA-shared index array also writable\nby the device; if the device sets cr_hia >= rxq->count, the while-loop\nnever terminates because cr_tia is wrapped via modulo rxq->count and can\nnever equal an out-of-range cr_hia.\n\nAdd bounds validation for cr_hia and frbd_tag in the RX path, and cr_hia\nin the TX path. Log invalid values with bt_dev_err before returning.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98601","source_modified_at":"2026-10-19T09:22:28.028Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"c2b636b3f788d10486a6691ad6dd3ec4c93bd78e","lessThan":"f42cd95e679d5b78611cd2208cd1c41ad0045ffa","status":"affected","versionType":"git"},{"version":"c2b636b3f788d10486a6691ad6dd3ec4c93bd78e","lessThan":"8ec5838a35b03ac0cf3602452a369898051ffaf9","status":"affected","versionType":"git"},{"version":"c2b636b3f788d10486a6691ad6dd3ec4c93bd78e","lessThan":"b29b70bfa12133423924fcd0327c19a802f7e368","status":"affected","versionType":"git"},{"version":"c2b636b3f788d10486a6691ad6dd3ec4c93bd78e","lessThan":"37a11129345337efd6eef8e62b03b6348cd0dd8b","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98601","source_modified_at":"2026-10-19T09:22:28.028Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98601","source_modified_at":"2026-10-19T09:22:28.028Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8ec5838a35b03ac0cf3602452a369898051ffaf9","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98601","source_modified_at":"2026-10-19T09:22:28.028Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"37a11129345337efd6eef8e62b03b6348cd0dd8b","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.002,"percentile":0.09316,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:13.760Z","modified_at":"2026-10-19T09:22:28.028Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98601","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:28.028Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98601","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/f42cd95e679d5b78611cd2208cd1c41ad0045ffa"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8ec5838a35b03ac0cf3602452a369898051ffaf9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b29b70bfa12133423924fcd0327c19a802f7e368"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/37a11129345337efd6eef8e62b03b6348cd0dd8b"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:22:28.028Z","content_hash":"b739f3cff0d7dc0333f233ec0ee812691add6c702f790c65f4a0413beb5a4bcc"}}