CVE-2023-1281
UAF in Linux kernel's tcindex (traffic control index filter) implementation
- State
- Published
- Severity
- 7.8 High
- Published
- Mar 22, 2023
- Updated
- Jul 30, 2026
- Reserved
- Mar 8, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
Linux KernelLinux |
|
References
- https://kernel.dance/#ee059170b1f7e94e55fa6cadee544e176a6e59c2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee059170b1f7e94e55fa6cadee544e176a6e59c2
- http://www.openwall.com/lists/oss-security/2023/04/11/3
- https://security.netapp.com/advisory/ntap-20230427-0004/
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
- https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
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