ReviewHigh

CVE-2026-74531

Linux

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: hold conn reference in abort_conn_sync() There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that.

CVSS: 8.8
EPSS: -
CISA KEV: Not listed
Published: 2026.08.15

PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 8.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= 249c88e7fb45b6b705040c5af4bd0d0f2bc9735c < 64d1645f26aa49b5a86ba2fccd0bb6749ea725a6, >= 227a0cdf4a028a73dc256d0f5144b4808d718893 < 963fb4b8e7d1ab07b4ae45bf15d41e667c88caca, >= 227a0cdf4a028a73dc256d0f5144b4808d718893 < e8f9fef362bab431d95371d3406bc720350290c3, >= 227a0cdf4a028a73dc256d0f5144b4808d718893 < fa812cfa81aa3d4a7b6ce8277979af57b3f79712, >= 227a0cdf4a028a73dc256d0f5144b4808d718893 < 5761d003daa987ac81463f570713ce9c9dd204e5, >= 7fe4d391e937c2f048a43ff4b421e677f10d83c0, >= 58afdc9b18871eb1d461c725be9e9f3f44a39aeb, >= 6.6.51 < 6.6.151, >= 6.1.184 < 6.2, >= 6.10.10 < 6.11, >= 6.11
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: Not available