1. Home
  2. Vulnerabilities
  3. CVE-2023-52556
6.2
MEDIUM CVSS 3.1
CVE-2023-52556
OpenBSD 7.4 pf state race condition kernel crash
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.

INFO

Published Date :

March 1, 2024, 5:15 p.m.

Last Modified :

Oct. 10, 2025, 5:44 p.m.

Remotely Exploit :

No

Source :

9119a7d8-5eab-497f-8521-727c672e3725
Affected Products

The following products are affected by CVE-2023-52556 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Openbsd openbsd
2 Openbsd openbsd
: Total Affected Vendor : 1 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-52556.

URL Resource
https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig Patch
https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 Patch
https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig Patch
https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-52556 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-52556 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-52556 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-52556 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Oct. 10, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:openbsd:openbsd:7.4:-:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_001:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:* versions up to (excluding) 7.4 *cpe:2.3:o:openbsd:openbsd:7.4:errata_002:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_003:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_004:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_005:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_006:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_007:*:*:*:*:*:* *cpe:2.3:o:openbsd:openbsd:7.4:errata_008:*:*:*:*:*:*
    Added Reference Type CVE: https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig Types: Patch
    Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig Types: Patch
    Added Reference Type CVE: https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 Types: Patch
    Added Reference Type Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government: https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 Types: Patch
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig
    Added Reference https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Nov. 14, 2024

    Action Type Old Value New Value
    Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE Modified by 9119a7d8-5eab-497f-8521-727c672e3725

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by 9119a7d8-5eab-497f-8521-727c672e3725

    Mar. 01, 2024

    Action Type Old Value New Value
    Added 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.
    Added Reference Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sig [No types assigned]
    Added Reference Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7 [No types assigned]
    Added CWE Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government CWE-367
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.2
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact