What is CVE-2023-52556?

CVE-2023-52556 is a medium-severity vulnerability in Openbsd, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.2/10. Published 2024-03-01.

How severe is CVE-2023-52556?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Is CVE-2023-52556 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Openbsd

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.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.001 (4.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openbsd — versions 7.4

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

9119a7d8-5eab-497f-8521-727c672e3725 (Patch)
9119a7d8-5eab-497f-8521-727c672e3725 (Patch)

Frequently asked questions

What is CVE-2023-52556?: CVE-2023-52556 is a medium-severity vulnerability in Openbsd, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 6.2/10. Published 2024-03-01.
How severe is CVE-2023-52556?: Medium severity. CVSS v3 base score is 6.2 out of 10.
Is CVE-2023-52556 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.