NetSight
IP …
high7.8

CVE-2023-3609

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.

Impact

A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.14 before 4.14.322
from 4.15 before 4.19.291
from 4.20 before 5.4.248
from 5.5 before 5.10.185
from 5.11 before 5.15.118
from 5.16 before 6.1.35
DebianDebian Linux
Versions 10.0, 11.0

Weakness classification

CWE-416

References