Bug 2529850 - CVE-2026-62437 xen: Xen: Memory leak due to re-established IRQ tracking structures during guest termination [fedora-all]
Summary: CVE-2026-62437 xen: Xen: Memory leak due to re-established IRQ tracking struc...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: xen
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Michael Young
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["1b281278-d5ab-48b2-982e-e...
Depends On:
Blocks: CVE-2026-62437
TreeView+ depends on / blocked
 
Reported: 2026-09-08 14:52 UTC by Vladimir Vasilev
Modified: 2026-09-18 01:34 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Vladimir Vasilev 2026-09-08 14:52:44 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

When guests are terminated, various pieces of cleanup need carrying out.
The cleaning up of PCI devices which were assigned to guests, and the
associated removal of tracking structures for IRQs used by the devices
occurs relatively early in the process.  Unfortunately after that point
the guest about to be terminated could cause its device model (DM) to
re-establish such tracking structures, by having it bind one or more IRQs
anew.  While some of those tracking structures would still be cleaned up
later on, at least one would not be.

Comment 1 Fedora Update System 2026-09-16 21:28:44 UTC
FEDORA-2026-1d448c1d40 (xen-4.21.2-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1d448c1d40

Comment 2 Fedora Update System 2026-09-17 18:14:43 UTC
FEDORA-2026-1d448c1d40 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-1d448c1d40`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1d448c1d40

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-09-17 20:19:10 UTC
FEDORA-2026-a9ea805bc1 (xen-4.20.4-2.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a9ea805bc1

Comment 4 Fedora Update System 2026-09-18 01:34:48 UTC
FEDORA-2026-a9ea805bc1 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-a9ea805bc1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a9ea805bc1

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.


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