Answer in brief
CVE-2026-74508 records a High severity (CVSS 8.8) vulnerability in Bluetooth: HIDP: reject frames without a transaction header. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <97b61241ab45bfa5b0526cb0f3978942493bc811 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2ebf63aa557a69990b4e9ea22be224d58aabce96 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <854194494a6f726a60b90b76059148bf08df023d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47778d2c2087b5d192398f6fddf692d16a5431cf | 46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec, 97b61241ab45bfa5b0526cb0f3978942493bc811, 2ebf63aa557a69990b4e9ea22be224d58aabce96, 854194494a6f726a60b90b76059148bf08df023d, 47778d2c2087b5d192398f6fddf692d16a5431cf |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <238c333bc4b3f245c626632e8bfa3c9dab97f51b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <567a2a0a633f2ea5fdccaf3517c09f22c9d860c7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <97b61241ab45bfa5b0526cb0f3978942493bc811 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2ebf63aa557a69990b4e9ea22be224d58aabce96 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <854194494a6f726a60b90b76059148bf08df023d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47778d2c2087b5d192398f6fddf692d16a5431cf | 238c333bc4b3f245c626632e8bfa3c9dab97f51b, 567a2a0a633f2ea5fdccaf3517c09f22c9d860c7, 46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec, 97b61241ab45bfa5b0526cb0f3978942493bc811, 2ebf63aa557a69990b4e9ea22be224d58aabce96, 854194494a6f726a60b90b76059148bf08df023d, 47778d2c2087b5d192398f6fddf692d16a5431cf |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <24c64ccd5c1fc9934b427335b0d976c7f2b1a7d8 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <238c333bc4b3f245c626632e8bfa3c9dab97f51b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <567a2a0a633f2ea5fdccaf3517c09f22c9d860c7 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <97b61241ab45bfa5b0526cb0f3978942493bc811 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2ebf63aa557a69990b4e9ea22be224d58aabce96 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <854194494a6f726a60b90b76059148bf08df023d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47778d2c2087b5d192398f6fddf692d16a5431cf | 24c64ccd5c1fc9934b427335b0d976c7f2b1a7d8, 238c333bc4b3f245c626632e8bfa3c9dab97f51b, 567a2a0a633f2ea5fdccaf3517c09f22c9d860c7, 46ca5ab39737d7c6f9ca77ecf714cdcfa6caaeec, 97b61241ab45bfa5b0526cb0f3978942493bc811, 2ebf63aa557a69990b4e9ea22be224d58aabce96, 854194494a6f726a60b90b76059148bf08df023d, 47778d2c2087b5d192398f6fddf692d16a5431cf |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: HIDP: reject frames without a transaction header hidp_recv_ctrl_frame() and hidp_recv_intr_frame() read skb->data[0] before checking that the L2CAP SDU contains a transaction header. A connected HIDP peer can send an empty basic-mode SDU and make both paths use an uninitialized byte from skb tailroom. KMSAN reports the use in hidp_session_run(), with the uninitialized value originating in __alloc_skb() through vhci_write(). The control path produces two reports and the interrupt path produces one. The byte can also be controlled by a malformed lower-layer packet. If an HCI ACL packet contains an L2CAP PDU with a declared zero-length payload followed by an extra 0x15 byte, l2cap_recv_acldata() reduces skb->len to the declared PDU length before dispatch. The current HIDP path nevertheless consumes the extra byte as HIDP_TRANS_HID_CONTROL | HIDP_CTRL_VIRTUAL_CABLE_UNPLUG and terminates the HIDP session. With this change, the same packet is discarded and a subsequent feature report request succeeds. Pull the transaction header with skb_pull_data() and discard frames that do not contain it.
Quoted source text, attributed separately from HOL analysis.