{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-71067", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:30:19.647Z", "datePublished": "2026-01-13T15:31:22.585Z", "dateUpdated": "2026-05-11T21:54:05.851Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:54:05.851Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: set dummy blocksize to read boot_block when mounting\n\nWhen mounting, sb->s_blocksize is used to read the boot_block without\nbeing defined or validated. Set a dummy blocksize before attempting to\nread the boot_block.\n\nThe issue can be triggered with the following syz reproducer:\n\n mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./file1\\x00', 0x0)\n r4 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000040), 0x121403, 0x0)\n ioctl$FS_IOC_SETFLAGS(r4, 0x40081271, &(0x7f0000000980)=0x4000)\n mount(&(0x7f0000000140)=@nullb, &(0x7f0000000040)='./cgroup\\x00',\n &(0x7f0000000000)='ntfs3\\x00', 0x2208004, 0x0)\n syz_clone(0x88200200, 0x0, 0x0, 0x0, 0x0, 0x0)\n\nHere, the ioctl sets the bdev block size to 16384. During mount,\nget_tree_bdev_flags() calls sb_set_blocksize(sb, block_size(bdev)),\nbut since block_size(bdev) > PAGE_SIZE, sb_set_blocksize() leaves\nsb->s_blocksize at zero.\n\nLater, ntfs_init_from_boot() attempts to read the boot_block while\nsb->s_blocksize is still zero, which triggers the bug.\n\n[almaz.alexandrovich@paragon-software.com: changed comment style, added\nreturn value handling]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/super.c"], "versions": [{"version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930", "lessThan": "0c9327c8abf9c8f046e45008bb43d94d8ee5c6c5", "status": "affected", "versionType": "git"}, {"version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930", "lessThan": "44a38eb4f7876513db5a1bccde74de9bc4389d43", "status": "affected", "versionType": "git"}, {"version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930", "lessThan": "4fff9a625da958a33191c8553a03283786f9f417", "status": "affected", "versionType": "git"}, {"version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930", "lessThan": "b3c151fe8f543f1a0b8b5df16ce5d97afa5ec85a", "status": "affected", "versionType": "git"}, {"version": "28861e3bbd9e7ac4cd9c811aad71b4d116e27930", "lessThan": "d1693a7d5a38acf6424235a6070bcf5b186a360d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs3/super.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.120", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.64", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.3", "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": "5.15", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.120"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.64"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0c9327c8abf9c8f046e45008bb43d94d8ee5c6c5"}, {"url": "https://git.kernel.org/stable/c/44a38eb4f7876513db5a1bccde74de9bc4389d43"}, {"url": "https://git.kernel.org/stable/c/4fff9a625da958a33191c8553a03283786f9f417"}, {"url": "https://git.kernel.org/stable/c/b3c151fe8f543f1a0b8b5df16ce5d97afa5ec85a"}, {"url": "https://git.kernel.org/stable/c/d1693a7d5a38acf6424235a6070bcf5b186a360d"}], "title": "ntfs: set dummy blocksize to read boot_block when mounting", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: set dummy blocksize to read boot_block when mounting\n\nWhen mounting, sb->s_blocksize is used to read the boot_block without\nbeing defined or validated. Set a dummy blocksize before attempting to\nread the boot_block.\n\nThe issue can be triggered with the following syz reproducer:\n\n mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./file1\\x00', 0x0)\n r4 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000040), 0x121403, 0x0)\n ioctl$FS_IOC_SETFLAGS(r4, 0x40081271, &(0x7f0000000980)=0x4000)\n mount(&(0x7f0000000140)=@nullb, &(0x7f0000000040)='./cgroup\\x00',\n &(0x7f0000000000)='ntfs3\\x00', 0x2208004, 0x0)\n syz_clone(0x88200200, 0x0, 0x0, 0x0, 0x0, 0x0)\n\nHere, the ioctl sets the bdev block size to 16384. During mount,\nget_tree_bdev_flags() calls sb_set_blocksize(sb, block_size(bdev)),\nbut since block_size(bdev) > PAGE_SIZE, sb_set_blocksize() leaves\nsb->s_blocksize at zero.\n\nLater, ntfs_init_from_boot() attempts to read the boot_block while\nsb->s_blocksize is still zero, which triggers the bug.\n\n[almaz.alexandrovich@paragon-software.com: changed comment style, added\nreturn value handling]"}, {"lang": "es", "value": "En el n\u00facleo de Linux, se ha solucionado la siguiente vulnerabilidad: ntfs: se establece un tama\u00f1o de bloque ficticio para leer boot_block al montar. Al montar, se utiliza sb->s_blocksize para leer boot_block sin que est\u00e9 definido ni validado. Establecer un tama\u00f1o de bloque ficticio antes de intentar leer el boot_block. El problema se puede reproducir con el siguiente c\u00f3digo de Syz: mkdirat(0xffffffffffffff9c, &(0x7f0000000080)=\u201c./file1\\x00\u201d, 0x0) r4 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000040), 0x121403, 0x0) ioctl$FS_IOC_SETFLAGS(r4, 0x40081271, &(0x7f0000000980)=0x4000) mount(&(0x7f0000000140)=@nullb, &(0x7f0000000040)='./ cgroup\\x00', &(0x7f0000000000)=\u201cntfs3\\x00\u201d, 0x2208004, 0x0) syz_clone(0x88200200, 0x0, 0x0, 0x0, 0x0, 0x0) Aqu\u00ed, el ioctl establece el tama\u00f1o de bloque de bdev en 16384. Durante el montaje, get_tree_bdev_flags() llama a sb_set_blocksize(sb, block_size(bdev)), pero dado que block_size(bdev) > PAGE_SIZE, sb_set_blocksize() deja sb->s_blocksize en cero. M\u00e1s tarde, ntfs_init_from_boot() intenta leer el boot_block mientras sb->s_blocksize sigue siendo cero, lo que desencadena el error. [almaz.alexandrovich@paragon-software.com: se ha cambiado el estilo de los comentarios y se ha a\u00f1adido el manejo del valor de retorno]"}], "id": "CVE-2025-71067", "lastModified": "2026-04-15T00:35:42.020", "metrics": {}, "published": "2026-01-13T16:16:06.077", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c9327c8abf9c8f046e45008bb43d94d8ee5c6c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/44a38eb4f7876513db5a1bccde74de9bc4389d43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4fff9a625da958a33191c8553a03283786f9f417"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b3c151fe8f543f1a0b8b5df16ce5d97afa5ec85a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d1693a7d5a38acf6424235a6070bcf5b186a360d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ntfs: set dummy blocksize to read boot_block when mounting", "id": "2429080", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429080"}, "csaw": false, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nntfs: set dummy blocksize to read boot_block when mounting\nWhen mounting, sb->s_blocksize is used to read the boot_block without\nbeing defined or validated. Set a dummy blocksize before attempting to\nread the boot_block.\nThe issue can be triggered with the following syz reproducer:\nmkdirat(0xffffffffffffff9c, &(0x7f0000000080)='./file1\\x00', 0x0)\nr4 = openat$nullb(0xffffffffffffff9c, &(0x7f0000000040), 0x121403, 0x0)\nioctl$FS_IOC_SETFLAGS(r4, 0x40081271, &(0x7f0000000980)=0x4000)\nmount(&(0x7f0000000140)=@nullb, &(0x7f0000000040)='./cgroup\\x00',\n&(0x7f0000000000)='ntfs3\\x00', 0x2208004, 0x0)\nsyz_clone(0x88200200, 0x0, 0x0, 0x0, 0x0, 0x0)\nHere, the ioctl sets the bdev block size to 16384. During mount,\nget_tree_bdev_flags() calls sb_set_blocksize(sb, block_size(bdev)),\nbut since block_size(bdev) > PAGE_SIZE, sb_set_blocksize() leaves\nsb->s_blocksize at zero.\nLater, ntfs_init_from_boot() attempts to read the boot_block while\nsb->s_blocksize is still zero, which triggers the bug.\n[almaz.alexandrovich@paragon-software.com: changed comment style, added\nreturn value handling]"], "name": "CVE-2025-71067", "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"}], "public_date": "2026-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71067\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71067\nhttps://lore.kernel.org/linux-cve-announce/2026011323-CVE-2025-71067-9c81@gregkh/T"]}

{}