BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/atom: Check kcalloc() for WS buffer in amdgpu_atom_execute_table_locked() kcalloc() may fail. When WS is non-zero and allocation fails, ectx.ws remains NULL while ectx.ws_size is set, leading to a potential NULL pointer dereference in atom_get_src_int() when accessing WS entries. Return -ENOMEM on allocation failure to avoid the NULL dereference.

CVSS Scores

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Meta Information

Published

2025-12-16

Last Modified

2025-12-18

Generated

2026-07-06

AI Q&A

2025-12-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68190

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability occurs in the Linux kernel's amdgpu driver where a memory allocation function, kcalloc(), may fail when allocating a workspace (WS) buffer. If the allocation fails, the code does not properly handle the failure and leaves a pointer (ectx.ws) as NULL while setting a size variable (ectx.ws_size). Later, when the code tries to access this NULL pointer in atom_get_src_int(), it can cause a NULL pointer dereference, potentially leading to a kernel crash or instability. The fix involves returning an error (-ENOMEM) when allocation fails to prevent this NULL dereference.

Impact Analysis

This vulnerability can cause a NULL pointer dereference in the Linux kernel, which may lead to a kernel crash or system instability. This can result in denial of service (DoS) conditions where the affected system becomes unresponsive or requires a reboot.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to update the Linux kernel to a version where the issue in drm/amdgpu/atom related to kcalloc() failure handling has been fixed. This update ensures that the kernel returns -ENOMEM on allocation failure, preventing the NULL pointer dereference.

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