What is CVE-2022-48793?

CVE-2022-48793 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 5.13 onward and patched in 5.15.25, 5.16.11 and 5.17. CVE-2022-48793 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-48793?

CVE-2022-48793 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-2022-48793?

Yes, CVE-2022-48793 has been patched. Fixed versions include 5.15.25, 5.16.11 and 5.17. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-48793 actively exploited?

CVE-2022-48793 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-2022-48793

Medium

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fix potential NULL derefernce on nested migration Turns out that due to review feedback and/or rebases I accidentally moved the call to nested_svm_load_cr3 to be too early, before the NPT is enabled, which is very wrong to do. KVM can't even access guest memory at that point as nested NPT is needed for that, and of course it won't initialize the walk_mmu, which is main issue the patch was addressing. Fix this for real.

Package Linux Kernel

Published 2024-07-16

Last modified 2024-11-21

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-2022-48793 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 5.13 and later are affected. Fixed in 5.15.25, 5.16.11, 5.17 and their respective stable series.

Affected from

≥ 5.13

Fixed in

✓ 5.15.25 5.15.x ✓ 5.16.11 5.16.x ✓ 5.17

References

3 total

Kernel Git
https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe

Patch
Kernel Git
https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6

Patch
Kernel Git
https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df

Patch

Details

CVE ID CVE-2022-48793

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-07-16

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-48793?

CVE-2022-48793 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 5.13 onward and has been patched in 5.15.25, 5.16.11 and 5.17. CVE-2022-48793 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-48793?

CVE-2022-48793 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-2022-48793?

Yes. CVE-2022-48793 has been patched. Fixed versions include 5.15.25, 5.16.11 and 5.17. If you are running Linux kernel 5.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-48793 actively exploited?

No. CVE-2022-48793 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.