CVE-2025-68368

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68368", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.309Z", "datePublished": "2025-12-24T10:32:54.765Z", "dateUpdated": "2026-10-21T12:38:19.281Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:38:19.281Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd: init bioset in mddev_init\n\nIO operations may be needed before md_run(), such as updating metadata\nafter writing sysfs. Without bioset, this triggers a NULL pointer\ndereference as below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n Call Trace:\n md_update_sb+0x658/0xe00\n new_level_store+0xc5/0x120\n md_attr_store+0xc9/0x1e0\n sysfs_kf_write+0x6f/0xa0\n kernfs_fop_write_iter+0x141/0x2a0\n vfs_write+0x1fc/0x5a0\n ksys_write+0x79/0x180\n __x64_sys_write+0x1d/0x30\n x64_sys_call+0x2818/0x2880\n do_syscall_64+0xa9/0x580\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nReproducer\n```\n mdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd]\n echo inactive > /sys/block/md0/md/array_state\n echo 10 > /sys/block/md0/md/new_level\n```\n\nmddev_init() can only be called once per mddev, no need to test if bioset\nhas been initialized anymore."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/md.c"], "versions": [{"version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "lessThan": "903fb4851ee8d291372d285f616c398a9c4cbbec", "status": "affected", "versionType": "git"}, {"version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "lessThan": "9d37fe37dfa0833a8768740f0575e0ffd793cb4a", "status": "affected", "versionType": "git"}, {"version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "lessThan": "381a3ce1c0ffed647c9b913e142b099c7e9d5afc", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/md/md.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.2", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "6.12", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/903fb4851ee8d291372d285f616c398a9c4cbbec"}, {"url": "https://git.kernel.org/stable/c/9d37fe37dfa0833a8768740f0575e0ffd793cb4a"}, {"url": "https://git.kernel.org/stable/c/381a3ce1c0ffed647c9b913e142b099c7e9d5afc"}], "title": "md: init bioset in mddev_init", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/md/md.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "903fb4851ee8d291372d285f616c398a9c4cbbec", "status": "affected", "version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "versionType": "git"}, {"lessThan": "9d37fe37dfa0833a8768740f0575e0ffd793cb4a", "status": "affected", "version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "versionType": "git"}, {"lessThan": "381a3ce1c0ffed647c9b913e142b099c7e9d5afc", "status": "affected", "version": "d981ed8419303ed12351eea8541ad6cb76455fe3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/md/md.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": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "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\nmd: init bioset in mddev_init\n\nIO operations may be needed before md_run(), such as updating metadata\nafter writing sysfs. Without bioset, this triggers a NULL pointer\ndereference as below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n Call Trace:\n md_update_sb+0x658/0xe00\n new_level_store+0xc5/0x120\n md_attr_store+0xc9/0x1e0\n sysfs_kf_write+0x6f/0xa0\n kernfs_fop_write_iter+0x141/0x2a0\n vfs_write+0x1fc/0x5a0\n ksys_write+0x79/0x180\n __x64_sys_write+0x1d/0x30\n x64_sys_call+0x2818/0x2880\n do_syscall_64+0xa9/0x580\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nReproducer\n```\n mdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd]\n echo inactive > /sys/block/md0/md/array_state\n echo 10 > /sys/block/md0/md/new_level\n```\n\nmddev_init() can only be called once per mddev, no need to test if bioset\nhas been initialized anymore."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmd: inicializar bioset en mddev_init\n\nLas operaciones de E/S pueden ser necesarias antes de md_run(), como actualizar metadatos despu\u00e9s de escribir sysfs. Sin bioset, esto desencadena una desreferencia de puntero NULL como se muestra a continuaci\u00f3n:\n\n BUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000020\n Traza de llamadas:\n md_update_sb+0x658/0xe00\n new_level_store+0xc5/0x120\n md_attr_store+0xc9/0x1e0\n sysfs_kf_write+0x6f/0xa0\n kernfs_fop_write_iter+0x141/0x2a0\n vfs_write+0x1fc/0x5a0\n ksys_write+0x79/0x180\n __x64_sys_write+0x1d/0x30\n x64_sys_call+0x2818/0x2880\n do_syscall_64+0xa9/0x580\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nReproductor\n'''\n mdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd]\n echo inactive > /sys/block/md0/md/array_state\n echo 10 > /sys/block/md0/md/new_level\n'''\n\nmddev_init() solo puede ser llamada una vez por mddev, ya no es necesario probar si bioset ha sido inicializado."}], "id": "CVE-2025-68368", "lastModified": "2026-10-21T13:18:23.260", "metrics": {}, "published": "2025-12-24T11:16:00.373", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/381a3ce1c0ffed647c9b913e142b099c7e9d5afc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/903fb4851ee8d291372d285f616c398a9c4cbbec"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d37fe37dfa0833a8768740f0575e0ffd793cb4a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: md: init bioset in mddev_init", "id": "2424882", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2424882"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmd: init bioset in mddev_init\nIO operations may be needed before md_run(), such as updating metadata\nafter writing sysfs. Without bioset, this triggers a NULL pointer\ndereference as below:\nBUG: kernel NULL pointer dereference, address: 0000000000000020\nCall Trace:\nmd_update_sb+0x658/0xe00\nnew_level_store+0xc5/0x120\nmd_attr_store+0xc9/0x1e0\nsysfs_kf_write+0x6f/0xa0\nkernfs_fop_write_iter+0x141/0x2a0\nvfs_write+0x1fc/0x5a0\nksys_write+0x79/0x180\n__x64_sys_write+0x1d/0x30\nx64_sys_call+0x2818/0x2880\ndo_syscall_64+0xa9/0x580\nentry_SYSCALL_64_after_hwframe+0x4b/0x53\nReproducer\n```\nmdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd]\necho inactive > /sys/block/md0/md/array_state\necho 10 > /sys/block/md0/md/new_level\n```\nmddev_init() can only be called once per mddev, no need to test if bioset\nhas been initialized anymore."], "name": "CVE-2025-68368", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68368\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68368\nhttps://lore.kernel.org/linux-cve-announce/2025122400-CVE-2025-68368-4e1b@gregkh/T"], "threat_severity": "Moderate"}

{}