Bug 2516987 (CVE-2026-74525)

Summary:	CVE-2026-74525 kernel: net: sxgbe: free TX rings on RX allocation failure
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 sxgbe network driver. When the system fails to allocate receive (RX) descriptor rings, the transmit (TX) rings that were previously allocated are not properly released. This oversight leads to a memory leak, which could result in resource exhaustion and potentially a Denial of Service (DoS) for the affected system.	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 2026-08-15 12:43:12 UTC

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

net: sxgbe: free TX rings on RX allocation failure

When RX descriptor ring allocation fails, init_dma_desc_rings() only
frees the partially allocated RX rings and returns. The TX rings that
were allocated earlier in the same function are leaked.

Rearrange error labels to clean up TX rings upon RX failures.

Comment 1 gkamathe 2026-08-21 09:10:26 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081545-CVE-2026-74525-47b2@gregkh/T