CVE-2023-52556
OpenBSD 7.4 pf state race condition kernel crash
MEDIUM
6.2
CVSS Score
Published: March 1, 2024 at 04:08 PM UTC
Updated: June 17, 2026 at 06:43 AM UTC
1 product affected across 1 vendorOpenBSD
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Severity
MEDIUM6.2
Exploit prediction
EPSS 0.1%
SSVC
No known exploit
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 7.47.4 ≤ v < 7.4 errata 0097.47.4 errata_0017.4 errata_0027.4 errata_0037.4 errata_0047.4 errata_0057.4 errata_0067.4 errata_0077.4 errata_008
Affected range stops below 7.4 errata 009, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (2)
Patch
Source: 9119a7d8-5eab-497f-8521-727c672e3725
https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/009_pf.patch.sigPatch
Source: 9119a7d8-5eab-497f-8521-727c672e3725
https://github.com/openbsd/src/commit/9d9f4dc6c833cb79d13f836581e3a781d06842e7SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
6.2MEDIUMCISA-ADP
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-367
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