CVE-2026-49424 — MEDIUM (5.5)

Vulnerability 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.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Freebsd	Freebsd	14.3

Related Weaknesses (CWE)

CWE-908

References

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

FAQ

What is CVE-2026-49424?

CVE-2026-49424 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 u...

How severe is CVE-2026-49424?

CVE-2026-49424 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-49424?

Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.