CVE-2026-49424 — Kernel stack disclosure in Linux compatibility layer

CVE-2026-49424

Kernel stack disclosure in Linux compatibility layer PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
FreeBSD / FreeBSD	affected 15.0-RELEASE before p11; affected 14.4-RELEASE before p7; affected 14.3-RELEASE before p16

CWE

CWE-908

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.