What is CVE-2026-74538?

CVE-2026-74538 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, affecting Linux kernel versions from 6.8.9 onward and patched in 6.18.44, 7.1.8 and 7.2. CVE-2026-74538 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74538?

CVE-2026-74538 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-2026-74538?

Yes, CVE-2026-74538 has been patched. Fixed versions include 6.18.44, 7.1.8 and 7.2. If you are running Linux kernel 6.8.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74538 actively exploited?

CVE-2026-74538 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74538

High

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_connect_ind Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the "ev3" part of iso_connect_ind. It may also be NULL if socket has transitioned away from the LISTEN/CONNECT states before locking. Fix by adding lock/release. Recheck hcon is valid after lock acquire where needed.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-17

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 6.8.9, 6.9 and later are affected. Fixed in 6.18.44, 7.1.8, 7.2 and their respective stable series.

Affected from

≥ 6.8.9 ≥ 6.9

Fixed in

✓ 6.18.44 6.18.x ✓ 7.1.8 7.1.x ✓ 7.2

References

3 total

Details

CVE ID CVE-2026-74538

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-08-15

Modified 2026-08-17

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-74538?

CVE-2026-74538 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 . It affects Linux kernel versions from 6.8.9 onward and has been patched in 6.18.44, 7.1.8 and 7.2. CVE-2026-74538 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-74538?

CVE-2026-74538 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-2026-74538?

Yes. CVE-2026-74538 has been patched. Fixed versions include 6.18.44, 7.1.8 and 7.2. If you are running Linux kernel 6.8.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74538 actively exploited?

No. CVE-2026-74538 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.