{"api_version":"1","generated_at":"2026-10-01T12:49:25+00:00","cve":"CVE-2026-90142","urls":{"html":"https://cve.report/CVE-2026-90142","api":"https://cve.report/api/cve/CVE-2026-90142.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90142","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90142"},"summary":{"title":"virtio_net: Fix resize of the RX ring","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix resize of the RX ring\n\nWhen a AF_XDP socket is attached, the virtnet_rx_resize\nshould resize the rq->xsk_buffs XSK buffer array. Otherwise,\nwhen the size grows, the virtnet_rx_resume() causes a write\npast the end of the array. This is easily reproducable with\n\n    ethtool -G ens3 rx 32\n    ./xdpsock -i eth0 -q 0 -r -z &\n    ethtool -G eth0 rx 256","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:06","updated_at":"2026-09-18 18:17:43"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/8344c9233c8f77017174d9e280c5a26034d068b6","name":"https://git.kernel.org/stable/c/8344c9233c8f77017174d9e280c5a26034d068b6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d09c98a6da215bce2173a292e4b95c8de6ea5d51","name":"https://git.kernel.org/stable/c/d09c98a6da215bce2173a292e4b95c8de6ea5d51","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90142","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90142","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 8344c9233c8f77017174d9e280c5a26034d068b6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 d09c98a6da215bce2173a292e4b95c8de6ea5d51 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90142","cve":"CVE-2026-90142","epss":"0.001540000","percentile":"0.049210000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/virtio_net.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8344c9233c8f77017174d9e280c5a26034d068b6","status":"affected","version":"e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568","versionType":"git"},{"lessThan":"d09c98a6da215bce2173a292e4b95c8de6ea5d51","status":"affected","version":"e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/virtio_net.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix resize of the RX ring\n\nWhen a AF_XDP socket is attached, the virtnet_rx_resize\nshould resize the rq->xsk_buffs XSK buffer array. Otherwise,\nwhen the size grows, the virtnet_rx_resume() causes a write\npast the end of the array. This is easily reproducable with\n\n    ethtool -G ens3 rx 32\n    ./xdpsock -i eth0 -q 0 -r -z &\n    ethtool -G eth0 rx 256"}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The overflow is driven by ring->rx_pending passed to virtnet_set_ringparam() from SIOCETHTOOL ETHTOOL_SRINGPARAM (ethtool_set_ringparam) or ETHTOOL_MSG_RINGS_SET (ethnl_set_rings), after virtnet_xsk_pool_enable() sized rq->xsk_buffs from AF_XDP bind(); received packets never supply the new vring length.\nAC:L - The reporter's sequence (ethtool -G rx 32, xdpsock -z, ethtool -G rx 256) deterministically grows the vring while leaving xsk_buffs at the old size; virtnet_rx_resume()->try_fill_recv()->virtnet_add_recvbuf_xsk() then passes rq->vq->num_free to xsk_buff_alloc_batch(). The attacker controls both sizes and the UMEM fill ring; there is no race.\nPR:L - ETHTOOL_MSG_RINGS_SET is GENL_UNS_ADMIN_PERM (netlink_ns_capable CAP_NET_ADMIN) and the ioctl path checks ns_capable(net->user_ns, CAP_NET_ADMIN); AF_XDP socket() checks ns_capable(net->user_ns, CAP_NET_RAW) in xsk_create(). Both are available in a user-owned netns that holds the virtio_net device, not init-namespace root.\nUI:N - The attacker themselves issues the ethtool ring-resize ioctl/netlink and bind()s the AF_XDP zero-copy socket (xdpsock -z) that calls virtnet_xsk_pool_enable(); no separate victim action such as mounting media is required.\nS:U - virtnet_add_recvbuf_xsk() overflows rq->xsk_buffs in the same kernel that hosts the virtio_net frontend. That is guest-kernel heap corruption, not a KVM/vhost guest-to-host escape or IOMMU bypass.\nC:H - After virtqueue_resize(), xsk_buff_alloc_batch() writes up to the new vring's num_free xdp_buff* values past the old xsk_buffs kvzalloc, corrupting adjacent heap objects with kernel pointers that can be turned into an arbitrary read.\nI:H - The same out-of-bounds xdp_buff* write, and the virtqueue_add_inbuf_premapped() loop that then consumes xsk_buffs[i] through that overflowed range, is kernel heap corruption usable for an arbitrary write or control-flow hijack.\nA:H - The heap overflow in virtnet_add_recvbuf_xsk() during virtnet_rx_resume() after virtqueue_resize() is a kernel memory-safety violation that oopses or panics even without a full exploit, matching the commit's write-past-end."}]}],"providerMetadata":{"dateUpdated":"2026-09-18T17:53:19.794Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/8344c9233c8f77017174d9e280c5a26034d068b6"},{"url":"https://git.kernel.org/stable/c/d09c98a6da215bce2173a292e4b95c8de6ea5d51"}],"title":"virtio_net: Fix resize of the RX ring","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90142","datePublished":"2026-09-17T16:06:39.122Z","dateReserved":"2026-09-11T19:38:34.789Z","dateUpdated":"2026-09-18T17:53:19.794Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:06","lastModifiedDate":"2026-09-18 18:17:43","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90142","Ordinal":"1","Title":"virtio_net: Fix resize of the RX ring","CVE":"CVE-2026-90142","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90142","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix resize of the RX ring\n\nWhen a AF_XDP socket is attached, the virtnet_rx_resize\nshould resize the rq->xsk_buffs XSK buffer array. Otherwise,\nwhen the size grows, the virtnet_rx_resume() causes a write\npast the end of the array. This is easily reproducable with\n\n    ethtool -G ens3 rx 32\n    ./xdpsock -i eth0 -q 0 -r -z &\n    ethtool -G eth0 rx 256","Type":"Description","Title":"virtio_net: Fix resize of the RX ring"}]}}}