What’s Vulnerable › Vulnerabilities

CVE-2023-27567

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-03 · updated 2026-06-17
• Weakness: CWE-400

Description

In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.

Affected products

• OpenBSD: 7.2

References

• https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/013_tcp.patch.sig
• https://github.com/openbsd/src/commit/0a543725ccdd2a01669122ce79bb67e66ede77f2
• https://security.netapp.com/advisory/ntap-20230406-0001/
• https://ftp.openbsd.org/pub/OpenBSD/patches/7.2/common/013_tcp.patch.sig
• https://github.com/openbsd/src/commit/0a543725ccdd2a01669122ce79bb67e66ede77f2
• https://security.netapp.com/advisory/ntap-20230406-0001/

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