CVE-2026-98008

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98008", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.068Z", "datePublished": "2026-09-25T10:23:33.532Z", "dateUpdated": "2026-10-19T09:12:13.751Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:13.751Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "versions": [{"version": "831e19e565b5210930fa183730071f8290c61263", "lessThan": "afa224cabc0132ca414b9141b1a919ca2d318cd0", "status": "affected", "versionType": "git"}, {"version": "81db1e52848694761a1aa162ce76198af9964ed8", "lessThan": "054ad8e66025eb4778d840bef80c270646cebcd2", "status": "affected", "versionType": "git"}, {"version": "d0c3601f2c4e12e7689b0f46ebc17525250ea8c3", "lessThan": "f737d999fcb8f276d77b01ea4c2016ee01dad19b", "status": "affected", "versionType": "git"}, {"version": "d0c3601f2c4e12e7689b0f46ebc17525250ea8c3", "lessThan": "5710f6a74f63cbba0e15cd75917234916181c9d4", "status": "affected", "versionType": "git"}, {"version": "d0c3601f2c4e12e7689b0f46ebc17525250ea8c3", "lessThan": "edb39c7666bb3924da761dfb417db85c1e5d8ad3", "status": "affected", "versionType": "git"}, {"version": "d0c3601f2c4e12e7689b0f46ebc17525250ea8c3", "lessThan": "38b6be101006d3e7af972999f45d4f1e8250587a", "status": "affected", "versionType": "git"}, {"version": "cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d", "status": "affected", "versionType": "git"}, {"version": "c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5", "status": "affected", "versionType": "git"}, {"version": "19088c5378c9fea54e552d8bc7418a3aa1e06990", "status": "affected", "versionType": "git"}, {"version": "6.1.114", "lessThan": "6.1.189", "status": "affected", "versionType": "semver"}, {"version": "6.6.58", "lessThan": "6.6.158", "status": "affected", "versionType": "semver"}, {"version": "5.10.228", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.169", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.11.5", "lessThan": "6.12", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/cadence/macb_main.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.114", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.58", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3"}, {"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": "6.11.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/afa224cabc0132ca414b9141b1a919ca2d318cd0"}, {"url": "https://git.kernel.org/stable/c/054ad8e66025eb4778d840bef80c270646cebcd2"}, {"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"}}}}

{}

{"affected": [{"affectedData": [{"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": "afa224cabc0132ca414b9141b1a919ca2d318cd0", "status": "affected", "version": "831e19e565b5210930fa183730071f8290c61263", "versionType": "git"}, {"lessThan": "054ad8e66025eb4778d840bef80c270646cebcd2", "status": "affected", "version": "81db1e52848694761a1aa162ce76198af9964ed8", "versionType": "git"}, {"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": "19088c5378c9fea54e552d8bc7418a3aa1e06990", "versionType": "git"}, {"lessThan": "6.1.189", "status": "affected", "version": "6.1.114", "versionType": "semver"}, {"lessThan": "6.6.158", "status": "affected", "version": "6.6.58", "versionType": "semver"}, {"lessThan": "5.11", "status": "affected", "version": "5.10.228", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.169", "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": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98008", "lastModified": "2026-10-19T10:17:52.177", "metrics": {}, "published": "2026-09-25T11:17:29.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/054ad8e66025eb4778d840bef80c270646cebcd2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38b6be101006d3e7af972999f45d4f1e8250587a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5710f6a74f63cbba0e15cd75917234916181c9d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afa224cabc0132ca414b9141b1a919ca2d318cd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edb39c7666bb3924da761dfb417db85c1e5d8ad3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f737d999fcb8f276d77b01ea4c2016ee01dad19b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: macb: fix NULL pointer dereference on unbind with fixed-link", "id": "2541229", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541229"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: macb: fix NULL pointer dereference on unbind with fixed-link\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.\nTwo cleanup paths then dereference this NULL bus:\n1. On driver unbind, macb_remove() unconditionally calls\nmdiobus_unregister(bp->mii_bus), which oopses:\nUnable to handle kernel NULL pointer dereference at virtual address 00000000000004a8\npc : mdiobus_unregister+0x14/0xa4\nlr : macb_remove+0x38/0xa4\nCall trace:\nmdiobus_unregister+0x14/0xa4 (P)\nmacb_remove+0x38/0xa4\nplatform_remove+0x20/0x30\ndevice_release_driver_internal+0x1c8/0x224\nunbind_store+0xb4/0xbc\n2. On the probe error path in macb_probe(), reached when\nmacb_mii_init() has succeeded but a subsequent step fails, the\nerr_out_unregister_mdio label runs the same unconditional cleanup.\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.", "A flaw was found in the Linux kernel's Cadence MACB ethernet driver. A local user with administrative privileges could cause a denial of service (DoS) by triggering a driver unbind operation or an initialization failure on a device configured with a fixed-link connection. In this configuration, the driver fails to allocate an internal bus structure, causing cleanup routines to dereference a NULL pointer and crash the kernel."], "name": "CVE-2026-98008", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98008\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98008\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98008.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0c3601f2c4e12e7689b0f46ebc17525250ea8c3,f737d999fcb8f276d77b01ea4c2016ee01dad19b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0c3601f2c4e12e7689b0f46ebc17525250ea8c3,5710f6a74f63cbba0e15cd75917234916181c9d4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0c3601f2c4e12e7689b0f46ebc17525250ea8c3,edb39c7666bb3924da761dfb417db85c1e5d8ad3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d0c3601f2c4e12e7689b0f46ebc17525250ea8c3,38b6be101006d3e7af972999f45d4f1e8250587a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "831e19e565b5210930fa183730071f8290c61263"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "81db1e52848694761a1aa162ce76198af9964ed8"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "19088c5378c9fea54e552d8bc7418a3aa1e06990"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.228,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.169,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.114,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.58,6.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.11.5,6.12)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.111,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.7,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T16:45:08.755064+00:00", "updated": "2026-09-30T14:30:18.596171+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}