{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99094","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.390Z","datePublished":"2026-10-26T14:52:02.053Z","dateUpdated":"2026-10-31T12:42:42.980Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-31T12:42:42.980Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btintel_pcie: fix TX descriptor bounds check\n\nbtintel_pcie_prepare_tx() uses tfd_index to access the TFD and data\nbuffer arrays before the index is advanced modulo txq->count. An index\nequal to txq->count is one past the end of both arrays, so reject it in\nthe bounds check."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:A - An adjacent BR/EDR peer's L2CAP Echo Request enters via btintel_pcie_msix_rx_handle() and l2cap_bredr_sig_cmd(), which echoes peer bytes through hci_send_frame() -> btintel_pcie_send_frame() -> patched btintel_pcie_send_sync(). Bluetooth radio range makes this AV:A.\nAC:H - The peer cannot create tfd_index==32: btintel_pcie_alloc() zeroes tr_hia, the ordered HCI workqueue serializes sends, btintel_pcie_send_sync() advances it modulo txq->count, and resets only zero it. Reaching 32 therefore needs corruption or a fault outside attacker control.\nPR:N - l2cap_bredr_sig_cmd() handles L2CAP_ECHO_REQ by directly queuing L2CAP_ECHO_RSP; that branch has no pairing, authentication, or capability gate, so the adjacent peer needs no target privileges.\nUI:N - No user action occurs in this path; after the bad head-index state exists, receipt of L2CAP_ECHO_REQ automatically builds and transmits the response into btintel_pcie_send_sync().\nS:U - btintel_pcie_prepare_tx() corrupts the host kernel's TX descriptors or memory reached through the post-array data pointer; it does not cross a VM, IOMMU, or other security authority.\nC:H - At index 32, btintel_pcie_prepare_tx() reads bufs[32].data beyond the heap array and writes peer-controlled Echo Response bytes through that pointer; this kernel memory corruption can enable control-flow hijack and disclosure.\nI:H - btintel_pcie_prepare_tx() zeroes and fills tfds[32] past the 32-entry descriptor array, then memcpy() writes through the out-of-bounds bufs[32].data pointer, providing exploitable kernel-memory modification.\nA:H - The invalid bufs[32].data pointer can fault the kernel in memcpy(), while the tfds[32] write corrupts the adjacent URBD0 completion-descriptor area and can stop the Bluetooth transport."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btintel_pcie.c"],"versions":[{"version":"6e65a09f927566f257322358d429b267548473eb","lessThan":"08704ec6d4bf69725e7815b09a9b5c7af83e255b","status":"affected","versionType":"git"},{"version":"6e65a09f927566f257322358d429b267548473eb","lessThan":"39ab048cce70d50af48015f5f294c4cf80d6ba89","status":"affected","versionType":"git"},{"version":"6e65a09f927566f257322358d429b267548473eb","lessThan":"2669567615215d52fb306053cbcc1f53dc386158","status":"affected","versionType":"git"},{"version":"6e65a09f927566f257322358d429b267548473eb","lessThan":"baa53af641c9e3644e717b8dfd1b95a55a0c111b","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btintel_pcie.c"],"versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/08704ec6d4bf69725e7815b09a9b5c7af83e255b"},{"url":"https://git.kernel.org/stable/c/39ab048cce70d50af48015f5f294c4cf80d6ba89"},{"url":"https://git.kernel.org/stable/c/2669567615215d52fb306053cbcc1f53dc386158"},{"url":"https://git.kernel.org/stable/c/baa53af641c9e3644e717b8dfd1b95a55a0c111b"}],"title":"Bluetooth: btintel_pcie: fix TX descriptor bounds check","x_generator":{"engine":"bippy-1.2.0"}}}}