7.6

CVE-2025-40301: linux

CVSS: 7.6v3.1HighDeferred
AliasesUBUNTU-CVE-2025-40301DEBIAN-CVE-2025-40301
Published 08-12-2025Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-40301 is a high (CVSS 7.6) vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 18.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 33 · Related 28
DLA-4436-1MGASA-2026-0017MGASA-2026-0018OPENSUSE-SU-2026:20145-1RHSA-2026:1690RHSA-2026:1727

Timeline

  1. 08-12-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu127 products
  • linux< 6.8.0-106.106 | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1050.53 | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.159-1 | < 6.12.63-1 | < 6.17.8-1
Linux1 product
  • linux≥ afcb3369f46ed5dc883a7b92f2dd1e264d79d388, < fea895de78d3bb2f0c09db9f10b18f8121b15759 | ≥ afcb3369f46ed5dc883a7b92f2dd1e264d79d388, < 779f83a91d4f1bf5ddfeaf528420cbb6dbf03fa8 | ≥ afcb3369f46ed5dc883a7b92f2dd1e264d79d388, < cf2c2acec1cf456c3d11c11a7589e886a0f963a9 | ≥ afcb3369f46ed5dc883a7b92f2dd1e264d79d388, < 1a0ddaaf97405dbd11d4cb5a961a3f82400e8a50 | ≥ afcb3369f46ed5dc883a7b92f2dd1e264d79d388, < 5c5f1f64681cc889d9b13e4a61285e9e029d6ab5 | 6.1

3 vendors · 129 products

References

25 links
Show all 25 references