CVE-2026-98461Bluetooth: hci_sock: validate event length before filtering
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sock: validate event length before filtering is_filtered_packet() reads the event code from skb->data[0] without first checking that the skb is nonempty. When an opcode filter is configured, it also reads the command opcode at offsets 3 or 4 without checking that a Command Complete or Command Status event is long enough. hci_send_to_sock() invokes the filter before hci_event_packet() validates the event header. A malformed event supplied by a controller or a vhci device can therefore cause an out-of-bounds read. Keep the unmasked event code for the opcode checks. The masked value is needed for the 64-bit event bitmap, but using it to identify command events aliases event codes above 0x3f. In particular, Synchronous Train Complete (0x4f) was treated as Command Status (0x0f) even though its payload has no opcode. Reject actual command events that are too short for the field being inspected. A truncated command event cannot match a configured opcode.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 39e99d85071bca0feeec3164a9437ca1bff297fc; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before ebdd49cec380731844ed9df4092a29a014623df4; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2501a3b7b7144d1d11939b355a48ed01f83d0c62; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before dca25c204f71be0556a15177dbe037237ac43e5e; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3976bbcd43b9b94c53ac9b0fd28888011588f4cc; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f894f6292d5122cd62d30600736b4a0ae79f7770; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 builds before 1a92763c2ba721bf113cd83f913fe8c511b4a4dc; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b0a6cf99afd57a39598b1beca0e86ef5004980de | CNA record |
References
- https://git.kernel.org/stable/c/39e99d85071bca0feeec3164a9437ca1bff297fc
- https://git.kernel.org/stable/c/ebdd49cec380731844ed9df4092a29a014623df4
- https://git.kernel.org/stable/c/2501a3b7b7144d1d11939b355a48ed01f83d0c62
- https://git.kernel.org/stable/c/dca25c204f71be0556a15177dbe037237ac43e5e
- https://git.kernel.org/stable/c/3976bbcd43b9b94c53ac9b0fd28888011588f4cc
- https://git.kernel.org/stable/c/f894f6292d5122cd62d30600736b4a0ae79f7770
- https://git.kernel.org/stable/c/1a92763c2ba721bf113cd83f913fe8c511b4a4dc
- https://git.kernel.org/stable/c/b0a6cf99afd57a39598b1beca0e86ef5004980de
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.