{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"96e05a8ce243e2207704e2e7a6e7d1172730f515","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"0e786123e46d08d2247ce93a5435e45ed9f4c5d1","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"990d123d9eaa3ac6c979eed245658676d65ce0db","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"0d515c409033c8e2a645a781be3ca76ab825fc8c","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"a6bb2f1fa62c56279bdcdadce28d1310c5e12b62","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"34f0f63dc6dc11895a17bb5672451b6b11622c99","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"},{"lessThan":"fb38fc58acb26d74fe8f7b19621fafaae3c040ff","status":"affected","version":"b17075d5c1988b83f840d272c795ac17d57ce804","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"4.11"},{"lessThan":"4.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.274","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.225","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.192","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.162","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.116","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.62","versionType":"semver"},{"lessThanOrEqual":"7.3.*","status":"unaffected","version":"7.3.3","versionType":"semver"}]}],"cveId":"CVE-2026-100081","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxen-netback: defer xenvif_mcast_addr_list_free()\n\nIn order for the function to legitimately avoid locking/RCU, it needs to\nrun after all TX/RX processing has finished/stopped: Lookups happen from\nxenvif_start_xmit(), while adds/removes happen from xenvif_tx_action()\n(called out of xenvif_poll()).\n\nMove the call out of xenvif_disconnect_data() (the call to the function\nfrom connect()'s error path doesn't require any cleaning up there), and\nput it past the synchronization point in backend_disconnect().\n\nThis is XSA-527 / CVE-2026-100081.","epss":{"date":"2026-11-10","percentile":0.15718,"score":0.00244},"exploits":[],"kev":null,"metrics":[{"score":7.8,"severity":"high","source":"CNA: Linux","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},{"score":7.8,"severity":"high","source":"NVD: 416baaa9-dc9f-4396-8d5f-8c081fb06d67","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794331037700,"publishedAt":1793989382185,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/96e05a8ce243e2207704e2e7a6e7d1172730f515"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/0e786123e46d08d2247ce93a5435e45ed9f4c5d1"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/990d123d9eaa3ac6c979eed245658676d65ce0db"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/0d515c409033c8e2a645a781be3ca76ab825fc8c"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/a6bb2f1fa62c56279bdcdadce28d1310c5e12b62"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/34f0f63dc6dc11895a17bb5672451b6b11622c99"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fb38fc58acb26d74fe8f7b19621fafaae3c040ff"},{"source":"ADP: CVE","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/11/06/10"},{"source":"ADP: CVE","tags":[],"url":"http://xenbits.xen.org/xsa/advisory-527.html"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/0d515c409033c8e2a645a781be3ca76ab825fc8c"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/0e786123e46d08d2247ce93a5435e45ed9f4c5d1"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/34f0f63dc6dc11895a17bb5672451b6b11622c99"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/96e05a8ce243e2207704e2e7a6e7d1172730f515"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/990d123d9eaa3ac6c979eed245658676d65ce0db"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/a6bb2f1fa62c56279bdcdadce28d1310c5e12b62"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/fb38fc58acb26d74fe8f7b19621fafaae3c040ff"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/11/06/10"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":[],"url":"http://xenbits.xen.org/xsa/advisory-527.html"}],"remediation":[],"revision":"c83299cdcbc194ba3b4b2ff343c168b1b680d7bb82c6b54d467daf1eeaa8c411","sources":[{"modifiedAt":1794329859730,"name":"CNA: Linux","retrievedAt":1794330501294,"url":"https://www.cve.org/CVERecord?id=CVE-2026-100081"},{"modifiedAt":1794331037700,"name":"NVD","retrievedAt":1794335781679,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-100081"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794330556550,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100081"}],"ssvc":null,"status":"published","title":"xen-netback: defer xenvif_mcast_addr_list_free()","updatedAt":1794335781679}