CVE-2026-52972
Received Received - Intake
AEAD AD Length Cap in Linux Kernel

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Cap AEAD AD length to 0x80000000 In order to prevent arithmetic overflows when checking the TX buffer size, cap the associated data length to 0x80000000.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-52972
EUVD
EUVD-2026-38840
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's crypto subsystem, specifically in the af_alg module. It involves the handling of the Associated Data (AD) length for AEAD (Authenticated Encryption with Associated Data) operations.

The issue is that the AD length was not properly capped, which could lead to arithmetic overflows when checking the transmit (TX) buffer size. To fix this, the AD length is now capped to 0x80000000 to prevent such overflows.

Impact Analysis

If exploited, this vulnerability could cause arithmetic overflows during buffer size checks in cryptographic operations, potentially leading to unexpected behavior such as memory corruption or crashes in the Linux kernel.

Such issues could be leveraged by attackers to cause denial of service or possibly escalate privileges depending on the context and exploitability.

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