CVE WatchSep 11, 2026

CVE-2026-57843

NetBSD contains an information disclosure vulnerability in mm_open() within sys/dev/mm.c that allows unprivileged local users to obtain real

CVSS

5.5

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 11, 2026 · Last modified: Sep 11, 2026 · CWE-732

EPSS · 30d

Not enough EPSS history yet.

Technical description

NetBSD contains an information disclosure vulnerability in mm_open() within sys/dev/mm.c that allows unprivileged local users to obtain real kernel virtual addresses by opening world-accessible devices such as /dev/null or /dev/zero, which incorrectly receive the PK_KMEM process flag. Attackers can exploit this misconfigured flag to bypass the CANSEE_KPTR obfuscation mechanism and read kernel virtual addresses for sensitive kernel structures including struct proc, kauth_cred, filedesc, and vmspace via sysctl KERN_PROC queries.

Official references

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