What is CVE-2022-48894?

CVE-2022-48894 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 6.1 onward and patched in 6.1.7 and 6.2. CVE-2022-48894 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-48894?

CVE-2022-48894 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-2022-48894?

Yes, CVE-2022-48894 has been patched. Fixed versions include 6.1.7 and 6.2. If you are running Linux kernel 6.1 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-48894 actively exploited?

CVE-2022-48894 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-2022-48894

Medium

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3: Don't unregister on shutdown Similar to SMMUv2, this driver calls iommu_device_unregister() from the shutdown path, which removes the IOMMU groups with no coordination whatsoever with their users - shutdown methods are optional in device drivers. This can lead to NULL pointer dereferences in those drivers' DMA API calls, or worse. Instead of calling the full arm_smmu_device_remove() from arm_smmu_device_shutdown(), let's pick only the relevant function call - arm_smmu_device_disable() - more or less the reverse of arm_smmu_device_reset() - and call just that from the shutdown path.

Package Linux Kernel

Published 2024-08-21

Last modified 2024-09-11

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-2022-48894 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 6.1 and later are affected. Fixed in 6.1.7, 6.2 and their respective stable series.

Affected from

≥ 6.1

Fixed in

✓ 6.1.7 6.1.x ✓ 6.2

References

2 total

Kernel Git
https://git.kernel.org/stable/c/32ea2c57dc216b6ad8125fa680d31daa5d421c95

Patch
Kernel Git
https://git.kernel.org/stable/c/ead3e6c79479890444c777fd329afc125fecde48

Patch

Details

CVE ID CVE-2022-48894

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-08-21

Modified 2024-09-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-48894?

CVE-2022-48894 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 6.1 onward and has been patched in 6.1.7 and 6.2. CVE-2022-48894 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-48894?

CVE-2022-48894 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-2022-48894?

Yes. CVE-2022-48894 has been patched. Fixed versions include 6.1.7 and 6.2. If you are running Linux kernel 6.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-48894 actively exploited?

No. CVE-2022-48894 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.