OpenBSD

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 005_tmux Errata topic: Reliability: tmux (All architectures) Issued: November 21, 2023 Upstream summary: Overlong sequences of UTF-8 combining characters could crash tmux(1). Table of contents Symptom & Impact Environment & Reproduction […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 008_vmm Errata topic: Reliability: vmm (amd64) Issued: December 10, 2023 Upstream summary: vmm(4) restored stale GDTR & TR values on vm exit which could lead to memory corruption or kernel deadlocks. […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 009_pf Errata topic: Reliability: pf (All architectures) Issued: December 10, 2023 Upstream summary: A race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic. […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 011_ssh Errata topic: Security: ssh (All architectures) Issued: December 18, 2023 Upstream summary: An SSH protocol weakness (the Terrapin Attack) exists that allows an on-path adversary to disable keystroke timing obfuscation. […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 014_vmm Errata topic: Security: vmm (amd64) Issued: February 29, 2024 Upstream summary: vmm(4) did not restore GDTR limits properly on Intel (VMX) CPUs. Table of contents Symptom & Impact Environment & […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 018_sndiod Errata topic: Security: sndiod (All architectures) Issued: August 2, 2024 Upstream summary: sndiod(8) main process could crash due to buffer overread. Table of contents Symptom & Impact Environment & Reproduction […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 021_nfs Errata topic: Security: nfs (All architectures) Issued: September 17, 2024 Upstream summary: Avoid possible mbuf double free in NFS client and server implementation. Do not use uninitialized variable in error […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 022_readdir Errata topic: Security: readdir (All architectures) Issued: September 17, 2024 Upstream summary: In readdir name validation exclude any '/' to avoid unexpected directory traversal on untrusted file systems. Table of […]

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 003_patch Errata topic: Reliability: patch (All architectures) Issued: November 21, 2023 Upstream summary: patch(1) with explicit patchfile did not work in 7.4 due to overeager unveil(2) restrictions. Table of contents Symptom […]

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: OpenBSD 7.4 📖 ~4 min read  •  Source: OpenBSD 7.4 errata 004_ospfd Errata topic: Reliability: ospfd (All architectures) Issued: November 21, 2023 Upstream summary: Simple passwords which were 8 characters long caused ospfd(8) to send out packets with invalid checksum. Table of […]