Bug 2516365 (CVE-2026-72448)

Summary:	CVE-2026-72448 kernel: octeontx2-pf: Fix leak of SQ timestamp buffer on 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 `octeontx2-pf` driver in the Linux kernel. When a network interface utilizing this driver is shut down or the device is removed, a memory leak occurs because the send-queue timestamp buffer is not properly deallocated. This continuous memory accumulation can lead to system instability and potentially a denial of service (DoS) over an extended period.	Story Points:	---
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Last Closed:		Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-15 06:08:41 UTC

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

octeontx2-pf: Fix leak of SQ timestamp buffer on teardown

The send-queue timestamp ring is allocated with qmem_alloc() when
timestamping is used, but otx2_free_sq_res() never freed sq->timestamps,
leaking that memory across ifdown and device removal.  Add the missing
qmem_free() alongside the other SQ companion buffers.

Comment 1 Keith Grant 2026-08-19 17:00:06 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081530-CVE-2026-72448-937a@gregkh/T