CVE-2026-49424: Freebsd

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Freebsd Freebsd: version 14.3 only; version 14.4 only; version 15.0 only

Published 2026-08-19. Last modified 2026-08-31.