What is CVE-2024-40945?

CVE-2024-40945 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 5.2 onward and patched in 5.4.279, 5.10.221, 5.15.162 and others. CVE-2024-40945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-40945?

CVE-2024-40945 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-40945?

Yes, CVE-2024-40945 has been patched. Fixed versions include 5.4.279, 5.10.221, 5.15.162 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-40945 actively exploited?

CVE-2024-40945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2024-40945

Medium

In the Linux kernel, the following vulnerability has been resolved: iommu: Return right value in iommu_sva_bind_device() iommu_sva_bind_device() should return either a sva bond handle or an ERR_PTR value in error cases. Existing drivers (idxd and uacce) only check the return value with IS_ERR(). This could potentially lead to a kernel NULL pointer dereference issue if the function returns NULL instead of an error pointer. In reality, this doesn't cause any problems because iommu_sva_bind_device() only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA. In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will return an error, and the device drivers won't call iommu_sva_bind_device() at all.

Package Linux Kernel

Published 2024-07-12

Last modified 2026-05-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2024-40945 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 5.2 and later are affected. Fixed in 5.4.279, 5.10.221, 5.15.162, 6.1.129, 6.6.35, 6.9.6, 6.10 and their respective stable series.

Affected from

≥ 5.2

Fixed in

✓ 5.4.279 5.4.x ✓ 5.10.221 5.10.x ✓ 5.15.162 5.15.x ✓ 6.1.129 6.1.x ✓ 6.6.35 6.6.x ✓ 6.9.6 6.9.x ✓ 6.10

References

11 total

Kernel Git
https://git.kernel.org/stable/c/2973b8e7d127754de9013177c41c0b5547406998

Patch
Kernel Git
https://git.kernel.org/stable/c/61a96da9649a6b6a1a5d5bde9374b045fdb5c12e

Patch
Kernel Git
https://git.kernel.org/stable/c/700f564758882db7c039dfba9443fe762561a3f8

Patch
Kernel Git
https://git.kernel.org/stable/c/7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6

Patch
Kernel Git
https://git.kernel.org/stable/c/89e8a2366e3bce584b6c01549d5019c5cda1205e

Patch

Showing 5 of 11 references View all on NVD

Details

CVE ID CVE-2024-40945

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-07-12

Modified 2026-05-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-40945?

CVE-2024-40945 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 5.2 onward and has been patched in 5.4.279, 5.10.221, 5.15.162 and others. CVE-2024-40945 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-40945?

CVE-2024-40945 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-40945?

Yes. CVE-2024-40945 has been patched. Fixed versions include 5.4.279, 5.10.221, 5.15.162 and others. If you are running Linux kernel 5.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-40945 actively exploited?

No. CVE-2024-40945 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.