What is CVE-2026-74531?

CVE-2026-74531 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.6.51 onward and patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74531 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74531?

CVE-2026-74531 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-74531?

Yes, CVE-2026-74531 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 6.6.51 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74531 actively exploited?

CVE-2026-74531 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74531

High

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.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.6.51, 6.1.184, 6.10.10, 6.11 and later are affected. Fixed in 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 and their respective stable series.

Affected from

≥ 6.6.51 ≥ 6.1.184 ≥ 6.10.10 ≥ 6.11

Fixed in

✓ 6.6.151 6.6.x ✓ 6.12.103 6.12.x ✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2

References

5 total

Details

CVE ID CVE-2026-74531

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-08-15

Modified 2026-08-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-74531?

CVE-2026-74531 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.6.51 onward and has been patched in 6.6.151, 6.12.103, 6.18.44 and others. CVE-2026-74531 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-74531?

CVE-2026-74531 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-74531?

Yes. CVE-2026-74531 has been patched. Fixed versions include 6.6.151, 6.12.103, 6.18.44 and others. If you are running Linux kernel 6.6.51 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74531 actively exploited?

No. CVE-2026-74531 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.