What is CVE-2022-49873?

CVE-2022-49873 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Incorrect Type Conversion or Cast flaw (CWE-704), affecting Linux kernel versions from 4.20 onward and patched in 5.10.155, 5.15.79, 6.0.9 and others. CVE-2022-49873 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-49873?

CVE-2022-49873 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-2022-49873?

Yes, CVE-2022-49873 has been patched. Fixed versions include 5.10.155, 5.15.79, 6.0.9 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-49873 actively exploited?

CVE-2022-49873 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Incorrect Type Conversion or Cast (CWE-704)?

The product does not correctly convert an object, resource, or structure from one type to another. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/704.html

CVE-2022-49873

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix wrong reg type conversion in release_reference() Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release these memories by calling the corresponding helper functions. When a resource is released, all pointer registers corresponding to the resource should be invalidated. The verifier use release_references() to do this job, by apply __mark_reg_unknown() to each relevant register. It will give these registers the type of SCALAR_VALUE. A register that will contain a pointer value at runtime, but of type SCALAR_VALUE, which may allow the unprivileged user to get a kernel pointer by storing this register into a map. Using __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this problem.

Package Linux Kernel

Published 2025-05-01

Last modified 2025-10-01

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-704

CVE-2022-49873 is a Incorrect Type Conversion or Cast vulnerability

What is Incorrect Type Conversion or Cast?

The product does not correctly convert an object, resource, or structure from one type to another. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.20 and later are affected. Fixed in 5.10.155, 5.15.79, 6.0.9, 6.1 and their respective stable series.

Affected from

≥ 4.20

Fixed in

✓ 5.10.155 5.10.x ✓ 5.15.79 5.15.x ✓ 6.0.9 6.0.x ✓ 6.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240

Patch
Kernel Git
https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5

Patch
Kernel Git
https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037

Patch
Kernel Git
https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b

Patch

Details

CVE ID CVE-2022-49873

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-05-01

Modified 2025-10-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2022-49873?

CVE-2022-49873 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Incorrect Type Conversion or Cast flaw (CWE-704) . It affects Linux kernel versions from 4.20 onward and has been patched in 5.10.155, 5.15.79, 6.0.9 and others. CVE-2022-49873 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2022-49873?

CVE-2022-49873 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-2022-49873?

Yes. CVE-2022-49873 has been patched. Fixed versions include 5.10.155, 5.15.79, 6.0.9 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-49873 actively exploited?

No. CVE-2022-49873 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.