CVE-2023-32233

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-08 · updated 2026-10-15
Weakness: CWE-416

Description

In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.

Affected products

Linux kernel: from 3.13 before 4.14.315; from 4.15 before 4.19.283; from 4.20 before 5.4.243; from 5.5 before 5.10.180; from 5.11 before 5.15.111; from 5.16 before 6.1.28 — fixed in 4.14.315, 4.19.283, 5.10.180, 5.15.111, 5.4.243, 6.1.28
NetApp Hci Baseboard Management Controller: h300s, h410c, h410s, h500s, h700s
Red Hat Enterprise Linux: 7.0, 8.0, 9.0

How to fix

Upgrade to a fixed version: Linux kernel 4.14.315, 4.19.283, 5.10.180, 5.15.111. Check the vendor advisory for mitigations.

References

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