{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99286","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.405Z","datePublished":"2026-11-10T18:16:53.997Z","dateUpdated":"2026-11-13T14:17:21.441Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-11-13T14:17:21.441Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: Fix XenBus connection failure cleanup\n\nxenvif_get_stats and xenvif_get_ethtool_stats capture vif->num_queues\nunder rcu_read_lock. We need to unpublish vif->num_queues before\nsynchronize_net to ensure that readers that come afterwards will not\nread a non-zero vif->num_queues and attempt to access invalid queues.\n\nThis is the same cleanup algorithm as used in backend_disconnect and\nadded in commit b17075d5c198 (\"xen-netback: fix race condition on XenBus\ndisconnect\").\n\nThis is XSA-531"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/xen-netback/xenbus.c"],"versions":[{"version":"6cd611d2abdd8623a554e14145f82c1cb4e4467a","lessThan":"ade3082dcdee17c5767069883936d64ff83f6c9f","status":"affected","versionType":"git"},{"version":"37d5a73170579b30e67cc8b19ec69715eea3a6b6","lessThan":"a97aa838903d15f865d80809f5198ff459c6634a","status":"affected","versionType":"git"},{"version":"4867687b6ad28ab84bc0811d8f8f9972e769da02","lessThan":"07aca7d25ce8578fedde49855983a01c537a782b","status":"affected","versionType":"git"},{"version":"5fb756f1bbec7a3862dda5d79028bf656271804c","status":"affected","versionType":"git"},{"version":"4223b33be49ee09acb6f1d26beb4a36dd3b8d63a","status":"affected","versionType":"git"},{"version":"ab9cdf1291be551da999510b30216a2886074d7a","status":"affected","versionType":"git"},{"version":"36f858f228e3f955b9336af7f94634747c221518","status":"affected","versionType":"git"},{"version":"89e534265b62c94749639350200b10370564bb3a","status":"affected","versionType":"git"},{"version":"6.12.116","lessThan":"6.12.117","status":"affected","versionType":"semver"},{"version":"6.18.62","lessThan":"6.18.63","status":"affected","versionType":"semver"},{"version":"7.3.3","lessThan":"7.3.4","status":"affected","versionType":"semver"},{"version":"5.10.274","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.15.225","lessThan":"5.16","status":"affected","versionType":"semver"},{"version":"6.1.192","lessThan":"6.2","status":"affected","versionType":"semver"},{"version":"6.6.162","lessThan":"6.7","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/xen-netback/xenbus.c"],"versions":[{"version":"7.4-rc2","status":"affected"},{"version":"0","lessThan":"7.4-rc2","status":"unaffected","versionType":"semver"},{"version":"6.12.117","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.63","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.3.4","lessThanOrEqual":"7.3.*","status":"unaffected","versionType":"semver"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.116","versionEndExcluding":"6.12.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.62","versionEndExcluding":"6.18.63"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.3.3","versionEndExcluding":"7.3.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.4-rc2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.225"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.192"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.162"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/ade3082dcdee17c5767069883936d64ff83f6c9f"},{"url":"https://git.kernel.org/stable/c/a97aa838903d15f865d80809f5198ff459c6634a"},{"url":"https://git.kernel.org/stable/c/07aca7d25ce8578fedde49855983a01c537a782b"}],"title":"xen-netback: Fix XenBus connection failure cleanup","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/11/10/25"},{"url":"http://xenbits.xen.org/xsa/advisory-531.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-11-10T21:05:24.916Z"}}]}}