CVE-2023-53493
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-01

Last updated on: 2025-10-02

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: accel/qaic: tighten bounds checking in decode_message() Copy the bounds checking from encode_message() to decode_message(). This patch addresses the following concerns. Ensure that there is enough space for at least one header so that we don't have a negative size later. if (msg_hdr_len < sizeof(*trans_hdr)) Ensure that we have enough space to read the next header from the msg->data. if (msg_len > msg_hdr_len - sizeof(*trans_hdr)) return -EINVAL; Check that the trans_hdr->len is not below the minimum size: if (hdr_len < sizeof(*trans_hdr)) This minimum check ensures that we don't corrupt memory in decode_passthrough() when we do. memcpy(out_trans->data, in_trans->data, len - sizeof(in_trans->hdr)); And finally, use size_add() to prevent an integer overflow: if (size_add(msg_len, hdr_len) > msg_hdr_len)
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Meta Information
Published
2025-10-01
Last Modified
2025-10-02
Generated
2026-06-16
AI Q&A
2025-10-01
EPSS Evaluated
2026-06-15
NVD
CVE-2023-53493
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's accel/qaic component involves insufficient bounds checking in the decode_message() function. The issue is that decode_message() did not properly verify that there was enough data space for headers and message contents, which could lead to negative sizes, memory corruption, or integer overflows. The patch fixes this by copying the stricter bounds checks from encode_message() to decode_message(), ensuring proper validation of message header lengths and preventing memory corruption.

Impact Analysis

If exploited, this vulnerability could lead to memory corruption within the Linux kernel's accel/qaic component. This could potentially cause system instability, crashes, or allow an attacker to execute arbitrary code with kernel privileges, depending on the context in which the vulnerable code is used.

Mitigation Strategies

Apply the patch that tightens bounds checking in the accel/qaic decode_message() function in the Linux kernel. This involves updating the kernel to a version that includes the fix which ensures proper validation of message header lengths and prevents memory corruption and integer overflow issues.

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