How severe is CVE-2023-52556?

CVE-2023-52556 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-52556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-52556?

CVE-2023-52556 primarily affects Openbsd. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-52556?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-52556 have an EU (EUVD) identifier?

Yes. CVE-2023-52556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-57180.

When was CVE-2023-52556 published?

CVE-2023-52556 was published on 2024-03-01 and last updated on 2026-06-17.

CVE-2023-52556

CVE-2023-52556 is a medium-severity vulnerability in Openbsd with a CVSS 3.x base score of 6.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-367.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-57180
Weakness: CWE-367
Affected product: Openbsd
Published: 2024-03-01
Last modified: 2026-06-17

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.

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.
How severe is CVE-2023-52556?: CVE-2023-52556 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-52556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-52556?: CVE-2023-52556 primarily affects Openbsd. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-52556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-52556 have an EU (EUVD) identifier?: Yes. CVE-2023-52556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-57180.
When was CVE-2023-52556 published?: CVE-2023-52556 was published on 2024-03-01 and last updated on 2026-06-17.

References

Affected products (10)

cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:7.4:-:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:7.4:errata_001:*:*:*:*:*:*
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:*:*:*:*:*:*

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