Bug 2373362 (CVE-2025-38053)

Summary:	CVE-2025-38053 kernel: idpf: fix null-ptr-deref in idpf_features_check
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:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the idpf module in the Linux kernel. A null pointer dereference can be triggered when the driver attempts to use a resource that has already been released, resulting in a denial of service.	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 2025-06-18 10:03:39 UTC

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

idpf: fix null-ptr-deref in idpf_features_check

idpf_features_check is used to validate the TX packet. skb header
length is compared with the hardware supported value received from
the device control plane. The value is stored in the adapter structure
and to access it, vport pointer is used. During reset all the vports
are released and the vport pointer that the netdev private structure
points to is NULL.

To avoid null-ptr-deref, store the max header length value in netdev
private structure. This also helps to cache the value and avoid
accessing adapter pointer in hot path.

BUG: kernel NULL pointer dereference, address: 0000000000000068
...
RIP: 0010:idpf_features_check+0x6d/0xe0 [idpf]
Call Trace:
 <TASK>
 ? __die+0x23/0x70
 ? page_fault_oops+0x154/0x520
 ? exc_page_fault+0x76/0x190
 ? asm_exc_page_fault+0x26/0x30
 ? idpf_features_check+0x6d/0xe0 [idpf]
 netif_skb_features+0x88/0x310
 validate_xmit_skb+0x2a/0x2b0
 validate_xmit_skb_list+0x4c/0x70
 sch_direct_xmit+0x19d/0x3a0
 __dev_queue_xmit+0xb74/0xe70
 ...

Comment 1 Avinash Hanwate 2025-06-20 18:20:04 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025061832-CVE-2025-38053-e145@gregkh/T