CVE-2023-3609
High
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedJul 21, 2023
First seenJul 21, 2023
Weakness typeCWE-416Use after free
How to fix
Update
- linux linux_kernel4.14.322, 4.19.291, 5.4.248, 5.10.185, 5.15.118, 6.1.35, 6.3.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.14 ≤ v < 4.14.322, 4.15 ≤ v < 4.19.291, 4.20 ≤ v < 5.4.248, 5.5 ≤ v < 5.10.185, 5.11 ≤ v < 5.15.118, 5.16 ≤ v < 6.1.35, 6.2 ≤ v < 6.3.9, 6.4 | 4.14.322, 4.19.291, 5.4.248, 5.10.185, 5.15.118, 6.1.35, 6.3.9 |
| debian debian_linux | 10.0, 11.0 | — |
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