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CVE-2026-98461

Unknown

Last modified

CVE-2026-98461 is a vulnerability of currently unknown severity. 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.

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 39e99d85071bca0feeec3164a9437ca1bff297fc; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ebdd49cec380731844ed9df4092a29a014623df4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2501a3b7b7144d1d11939b355a48ed01f83d0c62; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dca25c204f71be0556a15177dbe037237ac43e5e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3976bbcd43b9b94c53ac9b0fd28888011588f4cc; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f894f6292d5122cd62d30600736b4a0ae79f7770; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1a92763c2ba721bf113cd83f913fe8c511b4a4dc; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b0a6cf99afd57a39598b1beca0e86ef5004980de
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98461?
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.
How severe is CVE-2026-98461?
Severity scoring for CVE-2026-98461 is pending analysis.
How do I fix CVE-2026-98461?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST