CVE-2026-53264

Severity CVSS v4.0:

Pending analysis

Type:

CWE-416 Use After Free

Publication date:

25/06/2026

Last modified:

29/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_api: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently it is possible to create a race with an associated action. Let&#39;s illustrate with CPU0 running NEWTFILTER and CPU1 running DELFILTER: 0: mutex_lock()

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.14 (including)	5.10.259 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.210 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.176 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.143 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.94 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.36 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	7.0.13 (excluding)
cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::
cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::
cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::
cpe:2.3:o:linux:linux_kernel:7.1:rc5::::::
cpe:2.3:o:linux:linux_kernel:7.1:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-53264

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools