What is the CVSS score of CVE-2026-23001?

CVE-2026-23001 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Linux are affected by CVE-2026-23001?

CVE-2026-23001 presents notable security risk, a use-after-free vulnerability rated CVSS 7.8. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-23001?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Linux CVE-2026-23001

HIGH

Use After Free (CWE-416)

2026-01-25 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Linux Google Use After Free Memory Corruption Information Disclosure

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

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

SUSE

HIGH

qualitative

Red Hat

7.8 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Re-analysis Queued

Apr 27, 2026 - 14:22 vuln.today

cvss_changed

Patch released

Apr 09, 2026 - 20:30 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:59 vuln.today

CVE Published

Jan 25, 2026 - 15:15 nvd

HIGH 7.8

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

macvlan: fix possible UAF in macvlan_forward_source()

Add RCU protection on (struct macvlan_source_entry)->vlan.

Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts.

This allows macvlan_forward_source() to skip over entries queued for freeing.

Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)).

https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u

AnalysisAI

A use-after-free vulnerability in the Linux kernel's macvlan driver allows local attackers with user privileges to cause memory corruption and potential privilege escalation through improper RCU synchronization in the macvlan_forward_source() function. The flaw stems from missing RCU protection when clearing vlan pointers during source entry deletion, enabling attackers to access freed memory structures. No patch is currently available for this HIGH severity vulnerability affecting Linux distributions.

Technical ContextAI

In the Linux kernel, the following vulnerability has been resolved:

macvlan: fix possible UAF in macvlan_forward_source()

Add RCU protection on (struct macvlan_source_entry)->vlan.

Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts.

This allows macvlan_forward_source() to skip over entries queued for freeing.

Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)).

https: //lo

RemediationAI

Monitor vendor advisories for a patch.

Same weakness CWE-416 – Use After Free

View all

CVE-2019-0708 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2014-0322 HIGH POC

8.8

CVE-2012-4792 HIGH POC

8.8

CVE-2009-4324 HIGH POC

7.8

CVE-2015-0313 CRITICAL POC

9.8

CVE-2015-5122 CRITICAL POC

9.8

CVE-2013-2551 HIGH POC

8.8

Same technique Use After Free

View all

CVE-2015-5119 CRITICAL POC

9.8

CVE-2014-0322 HIGH POC

8.8

CVE-2012-4792 HIGH POC

8.8

CVE-2009-4324 HIGH POC

7.8

CVE-2015-0313 CRITICAL POC

9.8

CVE-2015-5122 CRITICAL POC

9.8

CVE-2013-2551 HIGH POC

8.8

CVE-2012-4969 HIGH POC

8.1

Vendor StatusVendor

SUSE

Severity: High

Product	Status
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.35 Container suse/sl-micro/6.0/toolbox:13.2-9.1 Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-GCE	Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.95 Image SL-Micro Image SLE-Micro Image SLE-Micro-EC2	Affected
Container suse/sl-micro/6.0/kvm-os-container:2.1.3-6.115	Affected
Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.146	Affected
Container suse/sl-micro/6.1/base-os-container:2.2.1-5.80 Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd	Affected

CVE-2026-23001 vulnerability details – vuln.today

Back

Container suse/sl-micro/6.1/kvm-os-container:2.2.1-5.83	Affected
Container suse/sl-micro/6.1/rt-os-container:2.2.1-5.91	Affected
Container suse/sle-micro-rancher/5.2:latest	Affected
Container suse/sle-micro/base-5.5:2.0.4-5.8.239 Image SLES15-SP5-BYOS-EC2 Image SLES15-SP5-HPC-BYOS-EC2 Image SLES15-SP5-Hardened-BYOS-EC2	Affected
Container suse/sle-micro/kvm-5.5:2.0.4-3.5.461	Affected
Container suse/sle-micro/rt-5.5:2.0.4-4.5.558	Affected
Image SLES-CHOST-BYOS-Aliyun Image SLES-CHOST-BYOS-Azure Image SLES-CHOST-BYOS-EC2 Image SLES-CHOST-BYOS-GCE Image SLES-CHOST-BYOS-GDC Image SLES-CHOST-BYOS-SAP-CCloud	Affected
Image SLES12-SP5-EC2-SAP-BYOS Image SLES12-SP5-SAP-Azure-LI-BYOS-Production Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production	Affected
Image SLES15-SP4-HPC-BYOS Image SLES15-SP4-HPC-BYOS-EC2 Image SLES15-SP4-HPC-EC2 Image SLES15-SP4-Hardened-BYOS Image SLES15-SP4-Hardened-BYOS-EC2	Affected
Image SLES15-SP4-SAP-BYOS Image SLES15-SP4-SAP-BYOS-EC2 Image SLES15-SP4-SAP-Hardened-BYOS Image SLES15-SP4-SAP-Hardened-BYOS-EC2	Affected
Image SLES15-SP5-SAP-Azure-LI-BYOS Image SLES15-SP5-SAP-Azure-LI-BYOS-Production Image SLES15-SP5-SAP-Azure-VLI-BYOS Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production Image SLES15-SP5-SAP-BYOS-EC2 Image SLES15-SP5-SAP-Hardened-BYOS-EC2	Affected
Image SLES15-SP6-BYOS Image SLES15-SP6-BYOS-EC2 Image SLES15-SP6-HPC-BYOS Image SLES15-SP6-HPC-BYOS-EC2 Image SLES15-SP6-HPC-EC2 Image SLES15-SP6-Hardened-BYOS Image SLES15-SP6-Hardened-BYOS-EC2	Affected
Image SLES15-SP6-SAP-BYOS Image SLES15-SP6-SAP-BYOS-EC2 Image SLES15-SP6-SAP-Hardened-BYOS Image SLES15-SP6-SAP-Hardened-BYOS-EC2 Image SLES15-SP6-SAP-Hardened-EC2	Affected
Image SLES15-SP7-BYOS-EC2 Image SLES15-SP7-CHOST-BYOS-Aliyun Image SLES15-SP7-CHOST-BYOS-Azure Image SLES15-SP7-CHOST-BYOS-EC2 Image SLES15-SP7-CHOST-BYOS-GCE Image SLES15-SP7-CHOST-BYOS-GDC Image SLES15-SP7-CHOST-BYOS-SAP-CCloud Image SLES15-SP7-GCE-3P Image SLES15-SP7-HPC-BYOS-EC2 Image SLES15-SP7-Hardened-BYOS-EC2	Affected
Image SLES15-SP7-SAP-Azure-LI-BYOS-Production Image SLES15-SP7-SAP-Azure-VLI-BYOS-Production Image SLES15-SP7-SAP-BYOS-EC2 Image SLES15-SP7-SAP-EC2 Image SLES15-SP7-SAP-GCE-3P Image SLES15-SP7-SAP-Hardened-BYOS-EC2	Affected
SUSE Liberty Linux 8	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP4	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 16.0	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed
SUSE Linux Enterprise Live Patching 15 SP7	Fixed
SUSE Linux Enterprise Micro 5.2	Fixed
SUSE Linux Enterprise Micro 5.3	Fixed
SUSE Linux Enterprise Micro 5.4	Fixed
SUSE Linux Enterprise Micro 5.5	Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7	Fixed
SUSE Linux Enterprise Module for Development Tools 15 SP7	Fixed
SUSE Linux Enterprise Module for Legacy 15 SP7	Fixed
SUSE Linux Enterprise Module for Public Cloud 15 SP7	Fixed
SUSE Linux Enterprise Real Time 15 SP7 SUSE Real Time Module 15 SP7	Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS	Fixed
SUSE Linux Enterprise Server 15 SP4-LTSS	Fixed
SUSE Linux Enterprise Server 15 SP5-LTSS	Fixed
SUSE Linux Enterprise Server 15 SP6-LTSS	Fixed
SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7	Fixed

Linux CVE-2026-23001

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

Technical ContextAI

RemediationAI

Same weakness CWE-416 – Use After Free

Same technique Use After Free

Vendor StatusVendor

SUSE

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External POC / Exploit Code