CVE-2026-52972

Analyzed Analyzed - Analysis Complete

AEAD AD Length Cap in Linux Kernel

Publication date: 2026-06-24

Last updated on: 2026-07-15

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-24

Last Modified

2026-07-15

Generated

2026-07-15

AI Q&A

2026-06-24

EPSS Evaluated

2026-07-13

NVD

CVE-2026-52972

EUVD

EUVD-2026-38840

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.2 (inc) to 6.6.141 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.91 (exc)
linux	linux_kernel	From 6.13 (inc) to 6.18.33 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.10 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.175 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.209 (exc)
linux	linux_kernel	From 4.1 (inc) to 5.10.258 (exc)
linux	linux_kernel	From 7.1 (inc) to 7.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

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.

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.

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