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

xen-netback: Fix XenBus connection failure cleanup

xenvif_get_stats and xenvif_get_ethtool_stats capture vif->num_queues
under rcu_read_lock. We need to unpublish vif->num_queues before
synchronize_net to ensure that readers that come afterwards will not
read a non-zero vif->num_queues and attempt to access invalid queues.

This is the same cleanup algorithm as used in backend_disconnect and
added in commit b17075d5c198 ("xen-netback: fix race condition on XenBus
disconnect").

This is XSA-531

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < ade3082dcdee17c5767069883936d64ff83f6c9f
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < a97aa838903d15f865d80809f5198ff459c6634a
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected < 07aca7d25ce8578fedde49855983a01c537a782b
0 affected < 6.12.117
0 affected < 6.18.63
0 affected < 7.3.4
Linux Linux affected
Version Status Constraints
6.12.117 unaffected ≤ 6.12.*
6.18.63 unaffected ≤ 6.18.*
7.3.4 unaffected ≤ 7.3.*

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References
Link Providers
https://git.kernel.org/stable/c/07aca7d25ce8578fedde49855983a01c537a782b cve-icon
https://git.kernel.org/stable/c/a97aa838903d15f865d80809f5198ff459c6634a cve-icon
https://git.kernel.org/stable/c/ade3082dcdee17c5767069883936d64ff83f6c9f cve-icon
History

Tue, 10 Nov 2026 18:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: xen-netback: Fix XenBus connection failure cleanup xenvif_get_stats and xenvif_get_ethtool_stats capture vif->num_queues under rcu_read_lock. We need to unpublish vif->num_queues before synchronize_net to ensure that readers that come afterwards will not read a non-zero vif->num_queues and attempt to access invalid queues. This is the same cleanup algorithm as used in backend_disconnect and added in commit b17075d5c198 ("xen-netback: fix race condition on XenBus disconnect"). This is XSA-531
Title xen-netback: Fix XenBus connection failure cleanup
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-11-10T18:16:53.997Z

Reserved: 2026-09-25T10:25:14.405Z

Link: CVE-2026-99286

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

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