CVE-2026-49424

Medium

Description

The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t. It did not first zero the stack struct. An unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information.

SeverityMedium

CVSS5.5

Exploit probability—

Product

Freebsd

PublishedAug 19, 2026

First seenAug 19, 2026

Weakness typeCWE-908CWE-908

How to fix

Vendor advisories

security.freebsd.org/advisories/FreeBSD-SA-26:47.linux.asc

Affected products

Product	Affected versions	Fixed in
freebsd freebsd	14.3, 14.4, 15.0	—

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