{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74507", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.908Z", "datePublished": "2026-08-15T12:27:30.683Z", "dateUpdated": "2026-08-19T16:38:05.065Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:38:05.065Z" }, "descriptions": [ { "lang": "en", "value": "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->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." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The flaw is reached when a connected Bluetooth HIDP peer sends crafted DATA frames over the established L2CAP control channel; Bluetooth is an adjacent wireless vector, not local syscall/ioctl or physical USB access.\nAC:L - The malicious peer receives the host GET_REPORT and can deterministically reply with a header-only DATA frame or a malformed numbered-report payload; no race or rare layout conditions beyond an active HIDP session are required.\nPR:N - Exploitation is performed by the remote Bluetooth HIDP peer sending malicious protocol data; the attacker needs no local account, capabilities, or init-namespace root on the victim host.\nUI:N - Once a HIDP session exists, the peer can trigger the bug by answering host-initiated GET_REPORT requests from HIDIOCGFEATURE or kernel HID probe I/O without any additional victim action at exploit time.\nS:U - Impact is confined to kernel Bluetooth HIDP/hidraw handling on the victim host; it does not cross a VM, container, or IOMMU security boundary to affect a separate authority.\nC:H - With numbered reports, hidp_process_data() reads skb->data[0] when skb->len is zero or beyond the declared L2CAP PDU, causing an out-of-bounds/uninitialized heap read that may contain stale kernel memory.\nI:L - Accepting malformed numbered-report responses can complete HIDIOCGFEATURE with incorrect zero-length or attacker-chosen report-ID data, causing limited integrity impact on returned HID feature-report contents.\nA:N - The defect is an invalid payload-length check and uninitialized/OOB read during report matching; it does not cause a documented kernel oops, panic, hang, or repeatable denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hidp/core.c" ], "versions": [ { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "011bf4350d941f1995b2bd4b815ee206cacf2b8e", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "689d8bb7fee96b7196b572b015b6055c6616ce0c", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "c73beb320f5705e508bf7d385b8cc5ef8d9c8b69", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "b7ad105d46acd828e424454815e4cd31069e047a", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "7e7162427659b70ea17cd41b1f79e2e64c246690", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "27cc0e603355c585f1e5da8398faa4d36d498188", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "9c841f59e10b5d75c398a3fc6b2da448d2a2276b", "status": "affected", "versionType": "git" }, { "version": "0ff1731a1ae51e8e48cd559d70db536281c47f8e", "lessThan": "34f53d27b81a16a02828c8fdfa4e02badc326f17", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/hidp/core.c" ], "versions": [ { "version": "2.6.39", "status": "affected" }, { "version": "0", "lessThan": "2.6.39", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "2.6.39", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.2" } ] } ] } ], "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" } ], "title": "Bluetooth: HIDP: validate numbered report payloads", "x_generator": { "engine": "bippy-1.2.0" } } } }