The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. (CVE-2026-49425)
CVE-2026-49425 is a vulnerability in the compat32 kevent() handler where a 64-bit kevent struct is translated into a stack-declared 32-bit struct without zeroing the stack memory first. This can allow an unprivileged user to observe a small amount of uninitialized kernel stack data, potentially exposing sensitive information.
AI Analysis
Technical Summary
The compat32 kevent() handler translates a 64-bit kevent struct into a 32-bit struct allocated on the stack but fails to zero the stack memory before use. This results in uninitialized kernel stack data being exposed to unprivileged users, which may contain sensitive information. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource). No patch or remediation information is provided in the available data.
Potential Impact
An unprivileged user may gain access to a small amount of uninitialized kernel stack data, which could include sensitive information. This exposure could lead to information disclosure but does not indicate direct code execution or privilege escalation based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit unprivileged user access to the affected system components if possible.
The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. (CVE-2026-49425)
Description
CVE-2026-49425 is a vulnerability in the compat32 kevent() handler where a 64-bit kevent struct is translated into a stack-declared 32-bit struct without zeroing the stack memory first. This can allow an unprivileged user to observe a small amount of uninitialized kernel stack data, potentially exposing sensitive information.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The compat32 kevent() handler translates a 64-bit kevent struct into a 32-bit struct allocated on the stack but fails to zero the stack memory before use. This results in uninitialized kernel stack data being exposed to unprivileged users, which may contain sensitive information. The vulnerability is classified under CWE-908 (Use of Uninitialized Resource). No patch or remediation information is provided in the available data.
Potential Impact
An unprivileged user may gain access to a small amount of uninitialized kernel stack data, which could include sensitive information. This exposure could lead to information disclosure but does not indicate direct code execution or privilege escalation based on the provided data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, limit unprivileged user access to the affected system components if possible.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-jjwm-g4j5-q96v
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-49425"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a85b4a4acd9273b492507a9
Added to database: 08/19/2026, 13:50:28 UTC
Last enriched: 08/19/2026, 13:58:48 UTC
Last updated: 08/20/2026, 01:32:11 UTC
Views: 2
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