CVE-2023-52556

MEDIUM

Published Mar 1, 2024 Modified Oct 10, 2025 CWE-367

Description

In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.

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CVSS v3.1 Score

6.2

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-367 CWE-367

Affected Products

Vendor	Product	Versions
openbsd	openbsd	< 7.4
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All
openbsd	openbsd	All

References

Advisories & Patches

https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7

Frequently Asked Questions

What is CVE-2023-52556? +

In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic. It has a CVSS v3.1 base score of 6.2 (MEDIUM).

How severe is CVE-2023-52556? +

CVE-2023-52556 has a CVSS v3.1 score of 6.2 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-52556? +

CVE-2023-52556 affects products from openbsd, specifically: openbsd. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52556? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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