CVE-2026-99286
xen-netback: Fix XenBus connection failure cleanup
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 10, 2026 |
| Last Updated | Nov 10, 2026 |
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Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ade3082dcdee17c5767069883936d64ff83f6c9f 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a97aa838903d15f865d80809f5198ff459c6634a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 07aca7d25ce8578fedde49855983a01c537a782b 0 < 6.12.117 0 < 6.18.63 0 < 7.3.4
Linux / Linux
All versions affected References
git.kernel.org: https://git.kernel.org/stable/c/ade3082dcdee17c5767069883936d64ff83f6c9f git.kernel.org: https://git.kernel.org/stable/c/a97aa838903d15f865d80809f5198ff459c6634a git.kernel.org: https://git.kernel.org/stable/c/07aca7d25ce8578fedde49855983a01c537a782b openwall.com: http://www.openwall.com/lists/oss-security/2026/11/10/25 xenbits.xen.org: http://xenbits.xen.org/xsa/advisory-531.html