CVE-2026-49424

Summary

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 Software

VendorProductVersion RangeStatus
FreeBSDFreeBSD15.0-RELEASE < p11affected
FreeBSDFreeBSD14.4-RELEASE < p7affected
FreeBSDFreeBSD14.3-RELEASE < p16affected

Weaknesses

  • CWE-908: CWE-908: Use of Uninitialized Resource

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References