BaseFortify

Publication date: 2025-12-04

Last updated on: 2025-12-06

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: sg: Do not sleep in atomic context sg_finish_rem_req() calls blk_rq_unmap_user(). The latter function may sleep. Hence, call sg_finish_rem_req() with interrupts enabled instead of disabled.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-12-04

Last Modified

2025-12-06

Generated

2026-07-06

AI Q&A

2025-12-04

EPSS Evaluated

2026-07-05

NVD

CVE-2025-40259

Affected Vendors & Products

Currently, no data is known.

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves the sg_finish_rem_req() function calling blk_rq_unmap_user(), which may sleep. Since sleeping is not allowed in atomic context (where interrupts are disabled), this can cause issues. The fix was to ensure sg_finish_rem_req() is called with interrupts enabled to avoid sleeping in atomic context.

Impact Analysis

If this vulnerability is exploited or triggered, it could cause kernel instability or crashes due to improper sleeping in atomic context, potentially leading to system hangs or data corruption.

Mitigation Strategies

To mitigate this vulnerability, update your Linux kernel to a version where the issue has been resolved, ensuring that sg_finish_rem_req() is called with interrupts enabled instead of disabled to prevent sleeping in atomic context.

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