CVE-2023-1829CWE-416

Use-after-free in tcindex (traffic control index filter) in the Linux Kernel

High · published April 12, 2023

CVSS v3.1
7.8
EPSS
1%
Percentile
64.1
In the wild
Unconfirmed
What it is

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 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ .

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01056 · 64.1th percentile
Weakness
CWE-416 · Use After Free
Published
2023-04-12T11:16Z
EPSS history
Timeline
  • 12 APR 11:16Z
    Use-after-free in tcindex (traffic control index filter) in the Linux Kernel
    cvelistv5