CVE-2023-1281

Name: CVE-2023-1281
Creator: NVD / NIST
Published: 2023-03-22T14:15:16.09+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2023-1281 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.30%

22.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	>= 4.14, < 5.10.169	—
Linux	Linux Kernel	>= 5.11, < 5.15.95	—
Linux	Linux Kernel	>= 5.16, < 6.1.13	—
Linux	Linux Kernel	6.2	Rc1

References

http://www.openwall.com/lists/oss-security/2023/04/11/3Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee059170b1f7e94e55fa6cadee544e176a6e59c2Patch, Vendor Advisory
https://kernel.dance/#ee059170b1f7e94e55fa6cadee544e176a6e59c2Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230427-0004/Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/04/11/3Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee059170b1f7e94e55fa6cadee544e176a6e59c2Patch, Vendor Advisory
https://kernel.dance/#ee059170b1f7e94e55fa6cadee544e176a6e59c2Patch, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230427-0004/Third Party Advisory

Timeline

Published: Mar 22, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-1281?

How severe is CVE-2023-1281?

CVE-2023-1281 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2023-1281?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-1281?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST