{"api_version":"1","generated_at":"2026-09-25T12:40:01+00:00","cve":"CVE-2026-98008","urls":{"html":"https://cve.report/CVE-2026-98008","api":"https://cve.report/api/cve/CVE-2026-98008.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98008","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98008"},"summary":{"title":"net: macb: fix NULL pointer dereference on unbind with fixed-link","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix NULL pointer dereference on unbind with fixed-link\n\nWhen the device tree describes a fixed-link and has no \"mdio\" child\nnode, macb_mii_init() returns early without allocating the MDIO bus,\nleaving bp->mii_bus as NULL.\n\nTwo cleanup paths then dereference this NULL bus:\n\n1. On driver unbind, macb_remove() unconditionally calls\n   mdiobus_unregister(bp->mii_bus), which oopses:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00000000000004a8\n  pc : mdiobus_unregister+0x14/0xa4\n  lr : macb_remove+0x38/0xa4\n  Call trace:\n   mdiobus_unregister+0x14/0xa4 (P)\n   macb_remove+0x38/0xa4\n   platform_remove+0x20/0x30\n   device_release_driver_internal+0x1c8/0x224\n   unbind_store+0xb4/0xbc\n\n2. On the probe error path in macb_probe(), reached when\n   macb_mii_init() has succeeded but a subsequent step fails, the\n   err_out_unregister_mdio label runs the same unconditional cleanup.\n\nmdiobus_unregister() and mdiobus_free() do not guard against a NULL\nbus, so guard the calls in both macb_remove() and the probe error\npath.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:29","updated_at":"2026-09-25 11:17:29"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/38b6be101006d3e7af972999f45d4f1e8250587a","name":"https://git.kernel.org/stable/c/38b6be101006d3e7af972999f45d4f1e8250587a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/edb39c7666bb3924da761dfb417db85c1e5d8ad3","name":"https://git.kernel.org/stable/c/edb39c7666bb3924da761dfb417db85c1e5d8ad3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5710f6a74f63cbba0e15cd75917234916181c9d4","name":"https://git.kernel.org/stable/c/5710f6a74f63cbba0e15cd75917234916181c9d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f737d999fcb8f276d77b01ea4c2016ee01dad19b","name":"https://git.kernel.org/stable/c/f737d999fcb8f276d77b01ea4c2016ee01dad19b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98008","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98008","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 f737d999fcb8f276d77b01ea4c2016ee01dad19b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 5710f6a74f63cbba0e15cd75917234916181c9d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 edb39c7666bb3924da761dfb417db85c1e5d8ad3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 38b6be101006d3e7af972999f45d4f1e8250587a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 831e19e565b5210930fa183730071f8290c61263 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 81db1e52848694761a1aa162ce76198af9964ed8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 19088c5378c9fea54e552d8bc7418a3aa1e06990 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.228 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.169 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.114 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.58 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11.5 6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * 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/cadence/macb_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f737d999fcb8f276d77b01ea4c2016ee01dad19b","status":"affected","version":"d0c3601f2c4e12e7689b0f46ebc17525250ea8c3","versionType":"git"},{"lessThan":"5710f6a74f63cbba0e15cd75917234916181c9d4","status":"affected","version":"d0c3601f2c4e12e7689b0f46ebc17525250ea8c3","versionType":"git"},{"lessThan":"edb39c7666bb3924da761dfb417db85c1e5d8ad3","status":"affected","version":"d0c3601f2c4e12e7689b0f46ebc17525250ea8c3","versionType":"git"},{"lessThan":"38b6be101006d3e7af972999f45d4f1e8250587a","status":"affected","version":"d0c3601f2c4e12e7689b0f46ebc17525250ea8c3","versionType":"git"},{"status":"affected","version":"cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d","versionType":"git"},{"status":"affected","version":"c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5","versionType":"git"},{"status":"affected","version":"831e19e565b5210930fa183730071f8290c61263","versionType":"git"},{"status":"affected","version":"81db1e52848694761a1aa162ce76198af9964ed8","versionType":"git"},{"status":"affected","version":"19088c5378c9fea54e552d8bc7418a3aa1e06990","versionType":"git"},{"lessThan":"5.11","status":"affected","version":"5.10.228","versionType":"semver"},{"lessThan":"5.16","status":"affected","version":"5.15.169","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.114","versionType":"semver"},{"lessThan":"6.7","status":"affected","version":"6.6.58","versionType":"semver"},{"lessThan":"6.12","status":"affected","version":"6.11.5","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/cadence/macb_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.7","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.228","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.169","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.114","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.58","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix NULL pointer dereference on unbind with fixed-link\n\nWhen the device tree describes a fixed-link and has no \"mdio\" child\nnode, macb_mii_init() returns early without allocating the MDIO bus,\nleaving bp->mii_bus as NULL.\n\nTwo cleanup paths then dereference this NULL bus:\n\n1. On driver unbind, macb_remove() unconditionally calls\n   mdiobus_unregister(bp->mii_bus), which oopses:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00000000000004a8\n  pc : mdiobus_unregister+0x14/0xa4\n  lr : macb_remove+0x38/0xa4\n  Call trace:\n   mdiobus_unregister+0x14/0xa4 (P)\n   macb_remove+0x38/0xa4\n   platform_remove+0x20/0x30\n   device_release_driver_internal+0x1c8/0x224\n   unbind_store+0xb4/0xbc\n\n2. On the probe error path in macb_probe(), reached when\n   macb_mii_init() has succeeded but a subsequent step fails, the\n   err_out_unregister_mdio label runs the same unconditional cleanup.\n\nmdiobus_unregister() and mdiobus_free() do not guard against a NULL\nbus, so guard the calls in both macb_remove() and the probe error\npath."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:23:33.532Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f737d999fcb8f276d77b01ea4c2016ee01dad19b"},{"url":"https://git.kernel.org/stable/c/5710f6a74f63cbba0e15cd75917234916181c9d4"},{"url":"https://git.kernel.org/stable/c/edb39c7666bb3924da761dfb417db85c1e5d8ad3"},{"url":"https://git.kernel.org/stable/c/38b6be101006d3e7af972999f45d4f1e8250587a"}],"title":"net: macb: fix NULL pointer dereference on unbind with fixed-link","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98008","datePublished":"2026-09-25T10:23:33.532Z","dateReserved":"2026-09-25T10:19:56.068Z","dateUpdated":"2026-09-25T10:23:33.532Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:29","lastModifiedDate":"2026-09-25 11:17:29","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98008","Ordinal":"1","Title":"net: macb: fix NULL pointer dereference on unbind with fixed-lin","CVE":"CVE-2026-98008","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98008","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: fix NULL pointer dereference on unbind with fixed-link\n\nWhen the device tree describes a fixed-link and has no \"mdio\" child\nnode, macb_mii_init() returns early without allocating the MDIO bus,\nleaving bp->mii_bus as NULL.\n\nTwo cleanup paths then dereference this NULL bus:\n\n1. On driver unbind, macb_remove() unconditionally calls\n   mdiobus_unregister(bp->mii_bus), which oopses:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00000000000004a8\n  pc : mdiobus_unregister+0x14/0xa4\n  lr : macb_remove+0x38/0xa4\n  Call trace:\n   mdiobus_unregister+0x14/0xa4 (P)\n   macb_remove+0x38/0xa4\n   platform_remove+0x20/0x30\n   device_release_driver_internal+0x1c8/0x224\n   unbind_store+0xb4/0xbc\n\n2. On the probe error path in macb_probe(), reached when\n   macb_mii_init() has succeeded but a subsequent step fails, the\n   err_out_unregister_mdio label runs the same unconditional cleanup.\n\nmdiobus_unregister() and mdiobus_free() do not guard against a NULL\nbus, so guard the calls in both macb_remove() and the probe error\npath.","Type":"Description","Title":"net: macb: fix NULL pointer dereference on unbind with fixed-lin"}]}}}