Bug 2559631 (CVE-2026-98966)

Summary:	CVE-2026-98966 kernel: bonding: fix the program leak when XDP is replaced
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, 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 network bonding driver. This vulnerability can lead to a Denial of Service (DoS) caused by kernel memory exhaustion when updating network filters. Because the driver fails to release the reference to an existing eXpress Data Path (XDP) program when a new program is attached, a local privileged user can repeatedly replace programs to leak memory and exhaust system resources.	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 2026-10-23 12:46:24 UTC

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

bonding: fix the program leak when XDP is replaced

We need to release the reference on the old BPF prog, whether
we are going to no-prog, or replacing the prog with another.

Spotted by AI while running tests for the propagation series
(leaked programs were accumulating). Selftest will come in
the net-next series to avoid conflicts.