Bug 2482068 (CVE-2026-46075)

Summary:	CVE-2026-46075 kernel: crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel, specifically within the `atmel-sha204a` cryptographic hardware random number generator (hwrng) driver. During the device removal process, a race condition can occur where a queued callback might execute while the device is being torn down. This can lead to a Use-After-Free (UAF) vulnerability, potentially allowing an attacker to execute arbitrary code or cause a denial of service. Additionally, an issue with early returns in the removal path could prevent proper freeing of resources, resulting in a memory leak.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-27 15:09:45 UTC

In the Linux kernel, the following vulnerability has been resolved:

crypto: atmel-sha204a - Fix potential UAF and memory leak in remove path

Unregister the hwrng to prevent new ->read() calls and flush the Atmel
I2C workqueue before teardown to prevent a potential UAF if a queued
callback runs while the device is being removed.

Drop the early return to ensure sysfs entries are removed and
->hwrng.priv is freed, preventing a memory leak.

Comment 1 Keith Grant 2026-05-27 17:41:20 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052759-CVE-2026-46075-8a6c@gregkh/T