CVE-2023-1281

High

Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.

Package Linux Kernel
Published 2023-03-22
Last modified 2026-07-30
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-2023-1281 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 4.14.0, 5.11.0, 5.16.0 and later are affected. Fixed in 6.2.0 and their respective stable series.

Affected from
≥ 4.14.0 ≥ 5.11.0 ≥ 5.16.0
Fixed in
✓ 6.2.0 6.2.x

References

6 total
Showing 5 of 6 references View all on NVD

Frequently asked questions

  • What is CVE-2023-1281?

    CVE-2023-1281 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 4.14.0 onward and has been patched in 6.2.0. CVE-2023-1281 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-1281?

    CVE-2023-1281 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-2023-1281?

    Yes. CVE-2023-1281 has been patched. Fixed versions include 6.2.0. If you are running Linux kernel 4.14.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2023-1281 actively exploited?

    No. CVE-2023-1281 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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