Bug 2492269 (CVE-2026-53016)

Summary:	CVE-2026-53016 kernel: crypto: ccp - copy IV using skcipher ivsize
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
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 cryptographic coprocessor (CCP) driver. When processing AF_ALG rfc3686-ctr-aes-ccp requests, the ccp_aes_complete() function attempts to restore more data than the allocated buffer for the Initialization Vector (IV) can hold. This leads to a buffer overrun, which can result in memory corruption within the kernel.	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 2026-06-24 18:02:00 UTC

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

crypto: ccp - copy IV using skcipher ivsize

AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver.

ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV
buffer while RFC3686 skciphers expose an 8-byte IV, so the restore
overruns the provided buffer.

Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.

Comment 1 Mauro Matteo Cascella 2026-06-25 13:22:25 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062451-CVE-2026-53016-90ac@gregkh/T

Comment 4 errata-xmlrpc 2026-07-13 12:16:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:38491 https://access.redhat.com/errata/RHSA-2026:38491

Comment 5 errata-xmlrpc 2026-07-14 21:14:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:39494 https://access.redhat.com/errata/RHSA-2026:39494

Comment 8 errata-xmlrpc 2026-08-17 15:30:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:55765 https://access.redhat.com/errata/RHSA-2026:55765

Comment 9 errata-xmlrpc 2026-08-17 16:51:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:55764 https://access.redhat.com/errata/RHSA-2026:55764

Comment 10 errata-xmlrpc 2026-08-19 01:15:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:56574 https://access.redhat.com/errata/RHSA-2026:56574

Comment 11 errata-xmlrpc 2026-08-25 15:18:41 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:59473 https://access.redhat.com/errata/RHSA-2026:59473

Comment 12 errata-xmlrpc 2026-08-25 17:27:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:59544 https://access.redhat.com/errata/RHSA-2026:59544

Comment 13 errata-xmlrpc 2026-08-31 03:30:35 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:61256 https://access.redhat.com/errata/RHSA-2026:61256

Comment 14 errata-xmlrpc 2026-09-08 00:23:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:64767 https://access.redhat.com/errata/RHSA-2026:64767

Comment 15 errata-xmlrpc 2026-09-09 00:35:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:65710 https://access.redhat.com/errata/RHSA-2026:65710

Comment 16 Jon Orris 2026-09-16 00:14:27 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:67721 https://access.redhat.com/errata/RHSA-2026:67721

Comment 17 Jon Orris 2026-09-16 00:42:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:67723 https://access.redhat.com/errata/RHSA-2026:67723