CVE-2026-49424

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.

References

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