{"api_version":"1","generated_at":"2026-05-12T19:41:37+00:00","cve":"CVE-2026-43094","urls":{"html":"https://cve.report/CVE-2026-43094","api":"https://cve.report/api/cve/CVE-2026-43094.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43094","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43094"},"summary":{"title":"ixgbevf: add missing negotiate_features op to Hyper-V ops table","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nixgbevf: add missing negotiate_features op to Hyper-V ops table\n\nCommit a7075f501bd3 (\"ixgbevf: fix mailbox API compatibility by\nnegotiating supported features\") added the .negotiate_features callback\nto ixgbe_mac_operations and populated it in ixgbevf_mac_ops, but forgot\nto add it to ixgbevf_hv_mac_ops. This leaves the function pointer NULL\non Hyper-V VMs.\n\nDuring probe, ixgbevf_negotiate_api() calls ixgbevf_set_features(),\nwhich unconditionally dereferences hw->mac.ops.negotiate_features().\nOn Hyper-V this results in a NULL pointer dereference:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  [...]\n  Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine [...]\n  Workqueue: events work_for_cpu_fn\n  RIP: 0010:0x0\n  [...]\n  Call Trace:\n   ixgbevf_negotiate_api+0x66/0x160 [ixgbevf]\n   ixgbevf_sw_init+0xe4/0x1f0 [ixgbevf]\n   ixgbevf_probe+0x20f/0x4a0 [ixgbevf]\n   local_pci_probe+0x50/0xa0\n   work_for_cpu_fn+0x1a/0x30\n   [...]\n\nAdd ixgbevf_hv_negotiate_features_vf() that returns -EOPNOTSUPP and\nwire it into ixgbevf_hv_mac_ops. The caller already handles -EOPNOTSUPP\ngracefully.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 10:16:22","updated_at":"2026-05-06 13:08:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb","name":"https://git.kernel.org/stable/c/1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4821d563cd7f251ae728be1a6d04af82a294a5b9","name":"https://git.kernel.org/stable/c/4821d563cd7f251ae728be1a6d04af82a294a5b9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2270ebab53128fb73c4a70a292be09094074737f","name":"https://git.kernel.org/stable/c/2270ebab53128fb73c4a70a292be09094074737f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d8a747057a17ffc79e31df1abb11d05e1669d8e5","name":"https://git.kernel.org/stable/c/d8a747057a17ffc79e31df1abb11d05e1669d8e5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4db7b61ec1d1b2b67c0881b62fc4f9583bc21484","name":"https://git.kernel.org/stable/c/4db7b61ec1d1b2b67c0881b62fc4f9583bc21484","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43094","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43094","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2e0aab9ddaf1428602c78f12064cd1e6ffcc4d18 d8a747057a17ffc79e31df1abb11d05e1669d8e5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf580112ed61736c2645a893413a04732505d4b1 2270ebab53128fb73c4a70a292be09094074737f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a7075f501bd33c93570af759b6f4302ef0175168 4db7b61ec1d1b2b67c0881b62fc4f9583bc21484 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a7075f501bd33c93570af759b6f4302ef0175168 1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a7075f501bd33c93570af759b6f4302ef0175168 4821d563cd7f251ae728be1a6d04af82a294a5b9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 871ac1cd4ce4804defcb428cbb003fd84c415ff4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a376e29b1b196dc90b50df7e5e3947e3026300c4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.136 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.83 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.24 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.14 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/intel/ixgbevf/vf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d8a747057a17ffc79e31df1abb11d05e1669d8e5","status":"affected","version":"2e0aab9ddaf1428602c78f12064cd1e6ffcc4d18","versionType":"git"},{"lessThan":"2270ebab53128fb73c4a70a292be09094074737f","status":"affected","version":"bf580112ed61736c2645a893413a04732505d4b1","versionType":"git"},{"lessThan":"4db7b61ec1d1b2b67c0881b62fc4f9583bc21484","status":"affected","version":"a7075f501bd33c93570af759b6f4302ef0175168","versionType":"git"},{"lessThan":"1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb","status":"affected","version":"a7075f501bd33c93570af759b6f4302ef0175168","versionType":"git"},{"lessThan":"4821d563cd7f251ae728be1a6d04af82a294a5b9","status":"affected","version":"a7075f501bd33c93570af759b6f4302ef0175168","versionType":"git"},{"status":"affected","version":"871ac1cd4ce4804defcb428cbb003fd84c415ff4","versionType":"git"},{"status":"affected","version":"a376e29b1b196dc90b50df7e5e3947e3026300c4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/intel/ixgbevf/vf.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.136","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.136","versionStartIncluding":"6.6.114","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.83","versionStartIncluding":"6.12.55","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.24","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.14","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.158","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nixgbevf: add missing negotiate_features op to Hyper-V ops table\n\nCommit a7075f501bd3 (\"ixgbevf: fix mailbox API compatibility by\nnegotiating supported features\") added the .negotiate_features callback\nto ixgbe_mac_operations and populated it in ixgbevf_mac_ops, but forgot\nto add it to ixgbevf_hv_mac_ops. This leaves the function pointer NULL\non Hyper-V VMs.\n\nDuring probe, ixgbevf_negotiate_api() calls ixgbevf_set_features(),\nwhich unconditionally dereferences hw->mac.ops.negotiate_features().\nOn Hyper-V this results in a NULL pointer dereference:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  [...]\n  Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine [...]\n  Workqueue: events work_for_cpu_fn\n  RIP: 0010:0x0\n  [...]\n  Call Trace:\n   ixgbevf_negotiate_api+0x66/0x160 [ixgbevf]\n   ixgbevf_sw_init+0xe4/0x1f0 [ixgbevf]\n   ixgbevf_probe+0x20f/0x4a0 [ixgbevf]\n   local_pci_probe+0x50/0xa0\n   work_for_cpu_fn+0x1a/0x30\n   [...]\n\nAdd ixgbevf_hv_negotiate_features_vf() that returns -EOPNOTSUPP and\nwire it into ixgbevf_hv_mac_ops. The caller already handles -EOPNOTSUPP\ngracefully."}],"providerMetadata":{"dateUpdated":"2026-05-06T07:40:25.930Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d8a747057a17ffc79e31df1abb11d05e1669d8e5"},{"url":"https://git.kernel.org/stable/c/2270ebab53128fb73c4a70a292be09094074737f"},{"url":"https://git.kernel.org/stable/c/4db7b61ec1d1b2b67c0881b62fc4f9583bc21484"},{"url":"https://git.kernel.org/stable/c/1455ff8809843e6e83f1f5b5c0bcc2224c99a3cb"},{"url":"https://git.kernel.org/stable/c/4821d563cd7f251ae728be1a6d04af82a294a5b9"}],"title":"ixgbevf: add missing negotiate_features op to Hyper-V ops table","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43094","datePublished":"2026-05-06T07:40:25.930Z","dateReserved":"2026-05-01T14:12:55.984Z","dateUpdated":"2026-05-06T07:40:25.930Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 10:16:22","lastModifiedDate":"2026-05-06 13:08:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43094","Ordinal":"1","Title":"ixgbevf: add missing negotiate_features op to Hyper-V ops table","CVE":"CVE-2026-43094","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43094","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nixgbevf: add missing negotiate_features op to Hyper-V ops table\n\nCommit a7075f501bd3 (\"ixgbevf: fix mailbox API compatibility by\nnegotiating supported features\") added the .negotiate_features callback\nto ixgbe_mac_operations and populated it in ixgbevf_mac_ops, but forgot\nto add it to ixgbevf_hv_mac_ops. This leaves the function pointer NULL\non Hyper-V VMs.\n\nDuring probe, ixgbevf_negotiate_api() calls ixgbevf_set_features(),\nwhich unconditionally dereferences hw->mac.ops.negotiate_features().\nOn Hyper-V this results in a NULL pointer dereference:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  [...]\n  Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine [...]\n  Workqueue: events work_for_cpu_fn\n  RIP: 0010:0x0\n  [...]\n  Call Trace:\n   ixgbevf_negotiate_api+0x66/0x160 [ixgbevf]\n   ixgbevf_sw_init+0xe4/0x1f0 [ixgbevf]\n   ixgbevf_probe+0x20f/0x4a0 [ixgbevf]\n   local_pci_probe+0x50/0xa0\n   work_for_cpu_fn+0x1a/0x30\n   [...]\n\nAdd ixgbevf_hv_negotiate_features_vf() that returns -EOPNOTSUPP and\nwire it into ixgbevf_hv_mac_ops. The caller already handles -EOPNOTSUPP\ngracefully.","Type":"Description","Title":"ixgbevf: add missing negotiate_features op to Hyper-V ops table"}]}}}