Kernel stack disclosure in 32-bit compatibility support

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-49425
StatePUBLISHED
Assignerfreebsd
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-19 08:17:12 UTC
Updated2026-08-19 08:17:12 UTC
DescriptionThe compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. It did not first zero the stack struct. An unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information.

Risk And Classification

Problem Types: CWE-908 | CWE-908 CWE-908: Use of Uninitialized Resource

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA FreeBSD FreeBSD affected 15.0-RELEASE p11 release Not specified
CNA FreeBSD FreeBSD affected 14.4-RELEASE p7 release Not specified
CNA FreeBSD FreeBSD affected 14.3-RELEASE p16 release Not specified

References

ReferenceSourceLinkTags
security.freebsd.org/advisories/FreeBSD-SA-26:48.compat32.asc [email protected] security.freebsd.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Adam Crosser, Praetorian (en)

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