CVE-2023-3609: Use-after-free in Linux kernel's net/sched: cls_u32 component

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Kernel

Default version status: unaffected

4.14.0 to < 4.14.322affected
4.15.0 to < 4.19.291affected
4.20.0 to < 5.4.248affected
5.5.0 to < 5.10.185affected
5.11.0 to < 5.15.118affected
5.16.0 to < 6.1.35affected
6.2.0 to < 6.3.9affected
6.4.0unaffected
04c55383fa5689357bcdd2c8036725a55ed632bcunaffected

CVE-2023-3609

Use-after-free in Linux kernel's net/sched: cls_u32 component

Description

Affected products

Linux Kernel

References