A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root.
We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | kernel | 2023-03-17 15:53 | ALAS-2023-1701 |
Amazon Linux 2 - Core | kernel | 2023-03-17 16:34 | ALAS2-2023-1987 |
Amazon Linux 2 - Kernel-5.10 Extra | kernel | 2023-03-17 16:46 | ALAS2KERNEL-5.10-2023-028 |
Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2023-03-17 16:46 | ALAS2KERNEL-5.15-2023-015 |
Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2023-03-17 16:45 | ALAS2KERNEL-5.4-2023-043 |
Amazon Linux 2023 | kernel | 2023-03-20 18:27 | ALAS2023-2023-138 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.8 | CVSS:3.1/AV:L/AC:L/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 |