CVE-2025-40301

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_event: validate skb length for unknown CC opcode

In hci_cmd_complete_evt(), if the command complete event has an unknown opcode, we assume the first byte of the remaining skb->data contains the return status. However, parameter data has previously been pulled in hci_event_func(), which may leave the skb empty. If so, using skb->data[0] for the return status uses un-init memory.

The fix is to check skb->len before using skb->data.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxafcb3369f46ed5dc883a7b92f2dd1e264d79d388 < fea895de78d3bb2f0c09db9f10b18f8121b15759affected
LinuxLinuxafcb3369f46ed5dc883a7b92f2dd1e264d79d388 < 779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8affected
LinuxLinuxafcb3369f46ed5dc883a7b92f2dd1e264d79d388 < cf2c2acec1cf456c3d11c11a7589e886a0f963a9affected
LinuxLinuxafcb3369f46ed5dc883a7b92f2dd1e264d79d388 < 1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50affected
LinuxLinuxafcb3369f46ed5dc883a7b92f2dd1e264d79d388 < 5c5f1f64681cc889d9b13e4a61285e9e029d6ab5affected
LinuxLinux6.1affected
LinuxLinux0 < 6.1unaffected
LinuxLinux6.1.159 <= 6.1.*unaffected
LinuxLinux6.6.117 <= 6.6.*unaffected
LinuxLinux6.12.58 <= 6.12.*unaffected
LinuxLinux6.17.8 <= 6.17.*unaffected
LinuxLinux6.18 <= *unaffected

Weaknesses

References