Vulnerability details
CVE-2025-40301
Linux Linux
Bluetooth: hci_event: validate skb length for unknown CC opcode
CVSS 3.1
7.6High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.6High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.1 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | afcb3369f46ed5dc883a7b92f2dd1e264d79d388 ≤ v < fea895de78d3bb2f0c09db9f10b18f8121b15759 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | afcb3369f46ed5dc883a7b92f2dd1e264d79d388 ≤ v < 779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | afcb3369f46ed5dc883a7b92f2dd1e264d79d388 ≤ v < cf2c2acec1cf456c3d11c11a7589e886a0f963a9 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | afcb3369f46ed5dc883a7b92f2dd1e264d79d388 ≤ v < 1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | afcb3369f46ed5dc883a7b92f2dd1e264d79d388 ≤ v < 5c5f1f64681cc889d9b13e4a61285e9e029d6ab5 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/fea895de78d3bb2f0c09db9f10b18f8121b15759
- https://git.kernel.org/stable/c/779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8
- https://git.kernel.org/stable/c/cf2c2acec1cf456c3d11c11a7589e886a0f963a9
- https://git.kernel.org/stable/c/1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50
- https://git.kernel.org/stable/c/5c5f1f64681cc889d9b13e4a61285e9e029d6ab5
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Details
- Published
- 2025-12-08
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.29%
Probability of exploitation in 30 days
21.7%
Percentile (among all CVEs)
Weaknesses (CWE)
- —