CVE-2024-10933: OpenBSD readdir directory traversal

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-05 · updated 2026-06-17
Weakness: CWE-22

Description

In OpenBSD 7.5 before errata 009 and OpenBSD 7.4 before errata 022, exclude any '/' in readdir name validation to avoid unexpected directory traversal on untrusted file systems.

Affected products

OpenBSD: before 7.4; 7.4, 7.4-errata_001, 7.4-errata_002, 7.4-errata_003, 7.4-errata_004, 7.4-errata_005 (+16) — fixed in 7.4

How to fix

Upgrade to a fixed version: OpenBSD 7.4. Check the vendor advisory for mitigations.

References

https://ftp.openbsd.org/pub/OpenBSD/patches/7.4/common/022_readdir.patch.sig
https://ftp.openbsd.org/pub/OpenBSD/patches/7.5/common/009_readdir.patch.sig

Get alerted when CVE-2024-10933 or the next vulnerability affects your stack