high · 7.8

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.

CVE-2023-5197 · GHSA-5xr7-jj63-cqf7 · EUVD-2023-57528 · published 26 Sept 2023

How serious is it

Severity: high, CVSS score 7.8 out of 10.
No exploit prediction (EPSS) score yet.
Not on the CISA list of exploited vulnerabilities.
No public exploit in Exploit-DB.

Is your app affected by CVE-2023-5197?

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Who is affected

Linux Kernel: 5.9 <6.6

How to check

Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.

Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. Addition and removal of rules from chain bindings within the same transaction causes leads to use-after-free. We recommend upgrading past commit f15f29fd4779be8a418b66e9d52979bb6d6c2325.

Check your whole app

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References

Merged from ENISA EUVD. Last updated 3 Nov 2026. All vulnerabilities · RSS · JSON

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