Bug 2414524 (CVE-2025-40176)

Summary:	CVE-2025-40176 kernel: tls: wait for pending async decryptions if tls_strp_msg_hold fails
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 vulnerability was found in tls_decrypt_sg in net/tls/tls_sw.c in networking subsystem in the Linux Kernel.In this flaw, If it fails to clone of the input skb to hold the reference to the memory it uses may lead a use-after-free.	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 2025-11-12 11:05:26 UTC

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

tls: wait for pending async decryptions if tls_strp_msg_hold fails

Async decryption calls tls_strp_msg_hold to create a clone of the
input skb to hold references to the memory it uses. If we fail to
allocate that clone, proceeding with async decryption can lead to
various issues (UAF on the skb, writing into userspace memory after
the recv() call has returned).

In this case, wait for all pending decryption requests.

Comment 1 Alexander B 2025-11-13 12:25:54 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025111255-CVE-2025-40176-f2e3@gregkh/T

Comment 7 errata-xmlrpc 2025-12-17 11:25:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:23241 https://access.redhat.com/errata/RHSA-2025:23241

Comment 11 errata-xmlrpc 2026-01-12 09:10:50 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:0453 https://access.redhat.com/errata/RHSA-2026:0453

Comment 12 errata-xmlrpc 2026-01-12 13:29:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:0457 https://access.redhat.com/errata/RHSA-2026:0457

Comment 13 errata-xmlrpc 2026-01-13 09:28:11 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:0489 https://access.redhat.com/errata/RHSA-2026:0489

Comment 14 errata-xmlrpc 2026-01-14 00:09:28 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:0534 https://access.redhat.com/errata/RHSA-2026:0534

Comment 15 errata-xmlrpc 2026-01-14 00:28:48 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:0535 https://access.redhat.com/errata/RHSA-2026:0535

Comment 16 errata-xmlrpc 2026-01-19 00:30:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:0747 https://access.redhat.com/errata/RHSA-2026:0747