Memory Leak in Linux Kernel Atmel-SHA204a Crypto Component

Publication date: 2026-04-03

Last updated on: 2026-05-26

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - Fix OOM ->tfm_count leak If memory allocation fails, decrement ->tfm_count to avoid blocking future reads.

CVSS Scores

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Meta Information

Published

2026-04-03

Last Modified

2026-05-26

Generated

2026-07-06

AI Q&A

2026-04-03

EPSS Evaluated

2026-07-05

NVD

CVE-2026-31391

EUVD

EUVD-2026-18764

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.2 (inc) to 6.6.130 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.78 (exc)
linux	linux_kernel	From 6.13 (inc) to 6.18.20 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.10 (exc)
linux	linux_kernel	From 5.11 (inc) to 6.1.167 (exc)
linux	linux_kernel	From 5.3 (inc) to 5.10.253 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is related to the Linux kernel's crypto subsystem, specifically the atmel-sha204a driver. It involves a memory management issue where, if a memory allocation fails, the reference count (tfm_count) is not properly decremented. This can lead to a leak that blocks future read operations.

Impact Analysis

The impact of this vulnerability is that it can cause a resource leak in the Linux kernel's crypto driver, potentially leading to denial of service by blocking future read operations due to the unreleased reference count.

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