CVE-2023-4244
Public on 2023-09-06
Modified on 2024-03-01
Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.
We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.
Due to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.
We recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2023-09-27 | ALAS-2023-1838 | Fixed |
| Amazon Linux 2 - Core | kernel | 2023-09-27 | ALAS2-2023-2264 | Fixed |
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2023-10-31 | ALAS2KERNEL-5.10-2023-042 | Fixed |
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2023-10-12 | ALAS2KERNEL-5.15-2023-028 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2024-01-03 | ALAS2KERNEL-5.4-2024-057 | Fixed |
| Amazon Linux 2023 | kernel | 2023-10-12 | ALAS2023-2023-385 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |