What is CVE-2026-74753?

CVE-2026-74753 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.6.145 onward and patched in 6.7, 6.13, 6.18.46 and others. CVE-2026-74753 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-74753?

CVE-2026-74753 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-74753?

Yes, CVE-2026-74753 has been patched. Fixed versions include 6.7, 6.13, 6.18.46 and others. If you are running Linux kernel 6.6.145 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-74753 actively exploited?

CVE-2026-74753 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-74753

High

In the Linux kernel, the following vulnerability has been resolved: perf: Reject exited events as group leaders perf_event_remove_on_exec() sets remove-on-exec events to the EXIT state and detaches their group relationships. The event's file descriptor can remain open, however, and perf_event_open() currently accepts that event as a group leader because its early validation rejects only REVOKED and DEAD events. A new sibling can consequently be linked to the detached leader. When the leader is closed, perf_group_detach() observes that its PERF_ATTACH_GROUP bit is already clear and skips the new sibling. The sibling then retains a group_leader pointer to the freed event. Reject group leaders in the EXIT state. Perform the check while holding the shared context mutex so that an exec in the target task cannot detach the leader between validation and group attachment. [peterz: make the earlier test fully consistent]

Package Linux Kernel

Published 2026-08-26

Last modified 2026-08-27

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Affected versions

Linux kernel versions 6.6.145, 6.12.96, 6.18.39, 7.1.4 and later are affected. Fixed in 6.7, 6.13, 6.18.46, 7.1.10 and their respective stable series.

Affected from

≥ 6.6.145 ≥ 6.12.96 ≥ 6.18.39 ≥ 7.1.4

Fixed in

✓ 6.7 6.7.x ✓ 6.13 6.13.x ✓ 6.18.46 6.18.x ✓ 7.1.10 7.1.x

References

3 total

Details

CVE ID CVE-2026-74753

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-08-26

Modified 2026-08-27

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-74753?

CVE-2026-74753 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.6.145 onward and has been patched in 6.7, 6.13, 6.18.46 and others. CVE-2026-74753 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-74753?

CVE-2026-74753 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-74753?

Yes. CVE-2026-74753 has been patched. Fixed versions include 6.7, 6.13, 6.18.46 and others. If you are running Linux kernel 6.6.145 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-74753 actively exploited?

No. CVE-2026-74753 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.