CVE-2026-49424CWE-908

CVE-2026-49424

Medium · published August 19, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
3.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00151 · 3.9th percentile
Weakness
CWE-908 · Use of Uninitialized Resource
Published
2026-08-19T12:17Z
Affected products (35)
ProductVersionsFixed in
freebsd/freebsdall versions—
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freebsd/freebsdall versions—
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freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
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freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
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freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
freebsd/freebsdall versions—
References (1)
https://security.freebsd.org/advisories/FreeBSD-SA-26:47.linux.asc · [email protected]
EPSS history
Timeline
  • 19 AUG 07:08Z
    Kernel stack disclosure in Linux compatibility layer
    cvelistv5