Bug 2482078 (CVE-2026-46028)

Summary:	CVE-2026-46028 kernel: crypto: algif_aead - snapshot IV for async AEAD requests
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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's `algif_aead` (Authenticated Encryption with Associated Data) subsystem. Asynchronous (async) requests for AEAD operations use a shared initialization vector (IV) buffer. This shared state can be modified by subsequent socket activity before an async request fully completes, leading to inconsistent IV handling. This inconsistency could potentially weaken cryptographic operations.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-27 15:10:15 UTC

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

crypto: algif_aead - snapshot IV for async AEAD requests

AF_ALG AEAD AIO requests currently use the socket-wide IV buffer during
request processing.  For async requests, later socket activity can
update that shared state before the original request has fully
completed, which can lead to inconsistent IV handling.

Snapshot the IV into per-request storage when preparing the AEAD
request, so in-flight operations no longer depend on mutable socket
state.

Comment 1 Keith Grant 2026-05-27 20:11:42 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052748-CVE-2026-46028-4f01@gregkh/T