NetSight
IP …
high7.8

CVE-2023-3776

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

Impact

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, fw_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 0323bce598eea038714f941ce2b22541c46d488f.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 2.6.12 before 4.14.322
from 4.15 before 4.19.291
from 4.20 before 5.4.251
from 5.5 before 5.10.188
from 5.11 before 5.15.121
from 5.16 before 6.1.40
DebianDebian Linux
Versions 10.0, 11.0, 12.0

Weakness classification

CWE-416

References