{"api_version":"1","generated_at":"2026-11-10T12:24:22+00:00","cve":"CVE-2026-100080","urls":{"html":"https://cve.report/CVE-2026-100080","api":"https://cve.report/api/cve/CVE-2026-100080.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-100080","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100080"},"summary":{"title":"xen-netback: Fix UAF when reading statistics data","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: Fix UAF when reading statistics data\n\nThe network statistic data in the driver is protected by RCU.\nUnfortunately when tearing down the queues after an error during\nconnecting to the frontend (e.g. due to illegal Xenstore data filled\nin by the guest), the statistic data is being freed without\nsynchronizing the RCU state.  In case the data is being read via sysfs\nin this phase, access to already freed memory or memory being in new\nuse is possible.\n\nFix that by calling synchronize_net() before freeing the queue data.\n\nThis is XSA-526 / CVE-2026-100080","state":"PUBLISHED","assigner":"Linux","published_at":"2026-11-06 19:17:03","updated_at":"2026-11-06 19:17:03"},"problem_types":[],"metrics":[],"references":[{"url":"http://xenbits.xen.org/xsa/advisory-526.html","name":"http://xenbits.xen.org/xsa/advisory-526.html","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4867687b6ad28ab84bc0811d8f8f9972e769da02","name":"https://git.kernel.org/stable/c/4867687b6ad28ab84bc0811d8f8f9972e769da02","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"http://www.openwall.com/lists/oss-security/2026/11/06/9","name":"http://www.openwall.com/lists/oss-security/2026/11/06/9","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/37d5a73170579b30e67cc8b19ec69715eea3a6b6","name":"https://git.kernel.org/stable/c/37d5a73170579b30e67cc8b19ec69715eea3a6b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/89e534265b62c94749639350200b10370564bb3a","name":"https://git.kernel.org/stable/c/89e534265b62c94749639350200b10370564bb3a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/36f858f228e3f955b9336af7f94634747c221518","name":"https://git.kernel.org/stable/c/36f858f228e3f955b9336af7f94634747c221518","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ab9cdf1291be551da999510b30216a2886074d7a","name":"https://git.kernel.org/stable/c/ab9cdf1291be551da999510b30216a2886074d7a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6cd611d2abdd8623a554e14145f82c1cb4e4467a","name":"https://git.kernel.org/stable/c/6cd611d2abdd8623a554e14145f82c1cb4e4467a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4223b33be49ee09acb6f1d26beb4a36dd3b8d63a","name":"https://git.kernel.org/stable/c/4223b33be49ee09acb6f1d26beb4a36dd3b8d63a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-100080","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100080","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 4223b33be49ee09acb6f1d26beb4a36dd3b8d63a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ab9cdf1291be551da999510b30216a2886074d7a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 36f858f228e3f955b9336af7f94634747c221518 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 89e534265b62c94749639350200b10370564bb3a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: Fix UAF when reading statistics data\n\nThe network statistic data in the driver is protected by RCU.\nUnfortunately when tearing down the queues after an error during\nconnecting to the frontend (e.g. due to illegal Xenstore data filled\nin by the guest), the statistic data is being freed without\nsynchronizing the RCU state.  In case the data is being read via sysfs\nin this phase, access to already freed memory or memory being in new\nuse is possible.\n\nFix that by calling synchronize_net() before freeing the queue data.\n\nThis is XSA-526 / CVE-2026-100080"}],"providerMetadata":{"dateUpdated":"2026-11-06T18:23:01.824Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4223b33be49ee09acb6f1d26beb4a36dd3b8d63a"},{"url":"https://git.kernel.org/stable/c/ab9cdf1291be551da999510b30216a2886074d7a"},{"url":"https://git.kernel.org/stable/c/36f858f228e3f955b9336af7f94634747c221518"},{"url":"https://git.kernel.org/stable/c/89e534265b62c94749639350200b10370564bb3a"},{"url":"https://git.kernel.org/stable/c/6cd611d2abdd8623a554e14145f82c1cb4e4467a"},{"url":"https://git.kernel.org/stable/c/37d5a73170579b30e67cc8b19ec69715eea3a6b6"},{"url":"https://git.kernel.org/stable/c/4867687b6ad28ab84bc0811d8f8f9972e769da02"}],"title":"xen-netback: Fix UAF when reading statistics data","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-100080","datePublished":"2026-11-06T18:23:01.824Z","dateReserved":"2026-09-25T10:25:14.456Z","dateUpdated":"2026-11-06T19:08:40.599Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-06 19:17:03","lastModifiedDate":"2026-11-06 19:17:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"100080","Ordinal":"1","Title":"xen-netback: Fix UAF when reading statistics data","CVE":"CVE-2026-100080","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"100080","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: Fix UAF when reading statistics data\n\nThe network statistic data in the driver is protected by RCU.\nUnfortunately when tearing down the queues after an error during\nconnecting to the frontend (e.g. due to illegal Xenstore data filled\nin by the guest), the statistic data is being freed without\nsynchronizing the RCU state.  In case the data is being read via sysfs\nin this phase, access to already freed memory or memory being in new\nuse is possible.\n\nFix that by calling synchronize_net() before freeing the queue data.\n\nThis is XSA-526 / CVE-2026-100080","Type":"Description","Title":"xen-netback: Fix UAF when reading statistics data"}]}}}