Bug 2516915 (CVE-2026-72499)

Summary:	CVE-2026-72499 kernel: RDMA/bnxt_re: Free CQ toggle page after firmware teardown
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
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Doc Text:	A flaw was found in the Linux kernel's RDMA/bnxt_re component. During firmware teardown, a memory page is prematurely freed. An NQ interrupt arriving at this time can write data to this already-freed memory, leading to memory corruption. This could potentially result in a system crash or other unpredictable behavior.	Story Points:	---
Clone Of:		Environment:
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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 06:40:11 UTC

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

RDMA/bnxt_re: Free CQ toggle page after firmware teardown

Free the toggle page only after firmware teardown completes so that
an NQ interrupt arriving during bnxt_qplib_destroy_cq() won't write
the toggle value to an already-freed page. Move free_page() after
bnxt_qplib_destroy_cq.

Comment 1 Keith Grant 2026-08-19 18:47:00 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081540-CVE-2026-72499-65d5@gregkh/T