CVE-2022-48742

High

In the Linux kernel, the following vulnerability has been resolved: rtnetlink: make sure to refresh master_dev/m_ops in __rtnl_newlink() While looking at one unrelated syzbot bug, I found the replay logic in __rtnl_newlink() to potentially trigger use-after-free. It is better to clear master_dev and m_ops inside the loop, in case we have to replay it.

Package Linux Kernel
Published 2024-06-20
Last modified 2024-11-21
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2022-48742 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.14 and later are affected. Fixed in 4.9.300, 4.14.265, 4.19.228, 5.4.177, 5.10.97, 5.15.20, 5.16.6, 5.17 and their respective stable series.

Affected from
≥ 3.14
Fixed in
✓ 4.9.300 4.9.x ✓ 4.14.265 4.14.x ✓ 4.19.228 4.19.x ✓ 5.4.177 5.4.x ✓ 5.10.97 5.10.x ✓ 5.15.20 5.15.x ✓ 5.16.6 5.16.x ✓ 5.17

References

8 total
Showing 5 of 8 references View all on NVD

Frequently asked questions

  • What is CVE-2022-48742?

    CVE-2022-48742 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 3.14 onward and has been patched in 4.9.300, 4.14.265, 4.19.228 and others. CVE-2022-48742 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2022-48742?

    CVE-2022-48742 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2022-48742?

    Yes. CVE-2022-48742 has been patched. Fixed versions include 4.9.300, 4.14.265, 4.19.228 and others. If you are running Linux kernel 3.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2022-48742 actively exploited?

    No. CVE-2022-48742 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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