CVE-2024-50217

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-50217", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.972Z", "datePublished": "2024-11-09T10:14:28.798Z", "dateUpdated": "2026-08-05T11:42:34.683Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:34.683Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()\n\nMounting btrfs from two images (which have the same one fsid and two\ndifferent dev_uuids) in certain executing order may trigger an UAF for\nvariable 'device->bdev_file' in __btrfs_free_extra_devids(). And\nfollowing are the details:\n\n1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs\n devices by ioctl(BTRFS_IOC_SCAN_DEV):\n\n / btrfs_device_1 \u2192 loop0\n fs_device\n \\ btrfs_device_2 \u2192 loop1\n2. mount /dev/loop0 /mnt\n btrfs_open_devices\n btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0)\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n fail: btrfs_close_devices // -ENOMEM\n\t btrfs_close_bdev(btrfs_device_1)\n fput(btrfs_device_1->bdev_file)\n\t // btrfs_device_1->bdev_file is freed\n\t btrfs_close_bdev(btrfs_device_2)\n fput(btrfs_device_2->bdev_file)\n\n3. mount /dev/loop1 /mnt\n btrfs_open_devices\n btrfs_get_bdev_and_sb(&bdev_file)\n // EIO, btrfs_device_1->bdev_file is not assigned,\n // which points to a freed memory area\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n btrfs_free_extra_devids\n if (btrfs_device_1->bdev_file)\n fput(btrfs_device_1->bdev_file) // UAF !\n\nFix it by setting 'device->bdev_file' as 'NULL' after closing the\nbtrfs_device in btrfs_close_one_device()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached only through local block-device operations \u2014 `mount(2)` of a btrfs volume plus device registration via `BTRFS_IOC_SCAN_DEV`/`device=` \u2014 on a locally attached device or loop-mounted image. No network or remote-peer data is involved.\nAC:L - The attacker fully controls both filesystem images and the order of the two mounts; the first mount's `open_ctree()` failure can be forced deterministically by corrupting the superblock/chunk tree rather than relying on the ENOMEM fault injection in the report, and no race must be won. Heap grooming of the `filp` slab between the two mounts is entirely under attacker control.\nPR:N - The attacker supplies only the malicious images (USB stick, disk image file, or loop-backed file) and needs no account or privilege on the target system; the privileged mount is performed by the victim or by an automounter such as udisks2 on the attacker's behalf.\nUI:R - Exploitation requires the victim (or an automount daemon acting for a logged-in user) to mount the attacker's crafted btrfs images, twice in sequence, since btrfs lacks `FS_USERNS_MOUNT` and cannot be mounted directly by an unprivileged attacker.\nS:U - The corruption and its consequences are confined to the kernel of the same system; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stray `fput()` on a freed `struct file` in a `SLAB_TYPESAFE_BY_RCU` cache causes a live file's refcount to be dropped, yielding a reusable use-after-free object that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same reference-count underflow gives a premature-free UAF on `struct file`, a well-established primitive for heap spraying, arbitrary write, and control-flow hijack leading to privilege escalation.\nA:H - Even without full exploitation the `fput()` on freed memory corrupts the slab and reliably produces a KASAN splat, refcount BUG, or kernel panic, taking the system down."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/volumes.c"], "versions": [{"version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "lessThan": "47a83f8df39545f3f552bb6a1b6d9c30e37621dd", "status": "affected", "versionType": "git"}, {"version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "lessThan": "aec8e6bf839101784f3ef037dcdb9432c3f32343", "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/btrfs/volumes.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.7", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "4.8", "versionEndExcluding": "6.11.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd"}, {"url": "https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343"}], "title": "btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50217", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-12-11T14:25:44.077787Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-11T14:58:32.841Z"}}, {"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2025/04/10/4"}, {"url": "http://www.openwall.com/lists/oss-security/2025/04/10/5"}, {"url": "http://www.openwall.com/lists/oss-security/2025/04/10/6"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-04-11T00:11:26.593Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2025/04/10/4"}, {"url": "http://www.openwall.com/lists/oss-security/2025/04/10/5"}, {"url": "http://www.openwall.com/lists/oss-security/2025/04/10/6"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-04-11T00:11:26.593Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50217", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-12-11T14:25:44.077787Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-12-11T14:25:45.668Z"}}], "cna": {"title": "btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached only through local block-device operations \u2014 `mount(2)` of a btrfs volume plus device registration via `BTRFS_IOC_SCAN_DEV`/`device=` \u2014 on a locally attached device or loop-mounted image. No network or remote-peer data is involved.\nAC:L - The attacker fully controls both filesystem images and the order of the two mounts; the first mount's `open_ctree()` failure can be forced deterministically by corrupting the superblock/chunk tree rather than relying on the ENOMEM fault injection in the report, and no race must be won. Heap grooming of the `filp` slab between the two mounts is entirely under attacker control.\nPR:N - The attacker supplies only the malicious images (USB stick, disk image file, or loop-backed file) and needs no account or privilege on the target system; the privileged mount is performed by the victim or by an automounter such as udisks2 on the attacker's behalf.\nUI:R - Exploitation requires the victim (or an automount daemon acting for a logged-in user) to mount the attacker's crafted btrfs images, twice in sequence, since btrfs lacks `FS_USERNS_MOUNT` and cannot be mounted directly by an unprivileged attacker.\nS:U - The corruption and its consequences are confined to the kernel of the same system; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stray `fput()` on a freed `struct file` in a `SLAB_TYPESAFE_BY_RCU` cache causes a live file's refcount to be dropped, yielding a reusable use-after-free object that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The same reference-count underflow gives a premature-free UAF on `struct file`, a well-established primitive for heap spraying, arbitrary write, and control-flow hijack leading to privilege escalation.\nA:H - Even without full exploitation the `fput()` on freed memory corrupts the slab and reliably produces a KASAN splat, refcount BUG, or kernel panic, taking the system down."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "lessThan": "47a83f8df39545f3f552bb6a1b6d9c30e37621dd", "versionType": "git"}, {"status": "affected", "version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "lessThan": "aec8e6bf839101784f3ef037dcdb9432c3f32343", "versionType": "git"}], "programFiles": ["fs/btrfs/volumes.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"status": "unaffected", "version": "0", "lessThan": "4.8", "versionType": "semver"}, {"status": "unaffected", "version": "6.11.7", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/btrfs/volumes.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd"}, {"url": "https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()\n\nMounting btrfs from two images (which have the same one fsid and two\ndifferent dev_uuids) in certain executing order may trigger an UAF for\nvariable 'device->bdev_file' in __btrfs_free_extra_devids(). And\nfollowing are the details:\n\n1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs\n devices by ioctl(BTRFS_IOC_SCAN_DEV):\n\n / btrfs_device_1 \u2192 loop0\n fs_device\n \\ btrfs_device_2 \u2192 loop1\n2. mount /dev/loop0 /mnt\n btrfs_open_devices\n btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0)\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n fail: btrfs_close_devices // -ENOMEM\n\t btrfs_close_bdev(btrfs_device_1)\n fput(btrfs_device_1->bdev_file)\n\t // btrfs_device_1->bdev_file is freed\n\t btrfs_close_bdev(btrfs_device_2)\n fput(btrfs_device_2->bdev_file)\n\n3. mount /dev/loop1 /mnt\n btrfs_open_devices\n btrfs_get_bdev_and_sb(&bdev_file)\n // EIO, btrfs_device_1->bdev_file is not assigned,\n // which points to a freed memory area\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n btrfs_free_extra_devids\n if (btrfs_device_1->bdev_file)\n fput(btrfs_device_1->bdev_file) // UAF !\n\nFix it by setting 'device->bdev_file' as 'NULL' after closing the\nbtrfs_device in btrfs_close_one_device()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.11.7", "versionStartIncluding": "4.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12", "versionStartIncluding": "4.8"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:34.683Z"}}}, "cveMetadata": {"cveId": "CVE-2024-50217", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:42:34.683Z", "dateReserved": "2024-10-21T19:36:19.972Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-11-09T10:14:28.798Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/btrfs/volumes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "47a83f8df39545f3f552bb6a1b6d9c30e37621dd", "status": "affected", "version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "versionType": "git"}, {"lessThan": "aec8e6bf839101784f3ef037dcdb9432c3f32343", "status": "affected", "version": "142388194191a3edc9ba01cfcfd8b691e0971fb2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/btrfs/volumes.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"lessThan": "4.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.11.*", "status": "unaffected", "version": "6.11.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.12", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92BAD6E0-7814-4F5F-9840-E742D79C4A05", "versionEndExcluding": "6.11.7", "versionStartIncluding": "4.8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*", "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*", "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()\n\nMounting btrfs from two images (which have the same one fsid and two\ndifferent dev_uuids) in certain executing order may trigger an UAF for\nvariable 'device->bdev_file' in __btrfs_free_extra_devids(). And\nfollowing are the details:\n\n1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs\n devices by ioctl(BTRFS_IOC_SCAN_DEV):\n\n / btrfs_device_1 \u2192 loop0\n fs_device\n \\ btrfs_device_2 \u2192 loop1\n2. mount /dev/loop0 /mnt\n btrfs_open_devices\n btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0)\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n fail: btrfs_close_devices // -ENOMEM\n\t btrfs_close_bdev(btrfs_device_1)\n fput(btrfs_device_1->bdev_file)\n\t // btrfs_device_1->bdev_file is freed\n\t btrfs_close_bdev(btrfs_device_2)\n fput(btrfs_device_2->bdev_file)\n\n3. mount /dev/loop1 /mnt\n btrfs_open_devices\n btrfs_get_bdev_and_sb(&bdev_file)\n // EIO, btrfs_device_1->bdev_file is not assigned,\n // which points to a freed memory area\n btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\n btrfs_fill_super\n open_ctree\n btrfs_free_extra_devids\n if (btrfs_device_1->bdev_file)\n fput(btrfs_device_1->bdev_file) // UAF !\n\nFix it by setting 'device->bdev_file' as 'NULL' after closing the\nbtrfs_device in btrfs_close_one_device()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: se corrige el use-after-free del archivo del dispositivo de bloque en __btrfs_free_extra_devids(). Montar btrfs desde dos im\u00e1genes (que tienen el mismo fsid y dos dev_uuids diferentes) en cierto orden de ejecuci\u00f3n puede activar un UAF para la variable 'device->bdev_file' en __btrfs_free_extra_devids(). Y a continuaci\u00f3n se muestran los detalles: 1. Adjunte image_1 a loop0, adjunte image_2 a loop1 y escanee los dispositivos btrfs con ioctl(BTRFS_IOC_SCAN_DEV): / btrfs_device_1 ? loop0 fs_device \\ btrfs_device_2 ? loop1 2. monte /dev/loop0 /mnt btrfs_open_devices btrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0) btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1) btrfs_fill_super open_ctree fail: btrfs_close_devices // -ENOMEM btrfs_close_bdev(btrfs_device_1) fput(btrfs_device_1->bdev_file) // btrfs_device_1->bdev_file se libera btrfs_close_bdev(btrfs_device_2) fput(btrfs_device_2->bdev_file) 3. mount /dev/loop1 /mnt btrfs_open_devices btrfs_get_bdev_and_sb(&bdev_file) // EIO, btrfs_device_1->bdev_file no est\u00e1 asignado, // lo que apunta a un \u00e1rea de memoria liberada btrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1) btrfs_fill_super open_ctree btrfs_free_extra_devids if (btrfs_device_1->bdev_file) fput(btrfs_device_1->bdev_file) // UAF! Arr\u00e9glelo configurando 'device->bdev_file' como 'NULL' despu\u00e9s de cerrar btrfs_device en btrfs_close_one_device()."}], "id": "CVE-2024-50217", "lastModified": "2026-08-04T11:21:33.953", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50217", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-12-11T14:25:44.077787Z", "version": "2.0.3"}}]}, "published": "2024-11-09T11:15:07.103", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47a83f8df39545f3f552bb6a1b6d9c30e37621dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aec8e6bf839101784f3ef037dcdb9432c3f32343"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2025/04/10/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2025/04/10/5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2025/04/10/6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: btrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()", "id": "2324866", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2324866"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: fix use-after-free of block device file in __btrfs_free_extra_devids()\nMounting btrfs from two images (which have the same one fsid and two\ndifferent dev_uuids) in certain executing order may trigger an UAF for\nvariable 'device->bdev_file' in __btrfs_free_extra_devids(). And\nfollowing are the details:\n1. Attach image_1 to loop0, attach image_2 to loop1, and scan btrfs\ndevices by ioctl(BTRFS_IOC_SCAN_DEV):\n/ btrfs_device_1 \u2192 loop0\nfs_device\n\\ btrfs_device_2 \u2192 loop1\n2. mount /dev/loop0 /mnt\nbtrfs_open_devices\nbtrfs_device_1->bdev_file = btrfs_get_bdev_and_sb(loop0)\nbtrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\nbtrfs_fill_super\nopen_ctree\nfail: btrfs_close_devices // -ENOMEM\nbtrfs_close_bdev(btrfs_device_1)\nfput(btrfs_device_1->bdev_file)\n// btrfs_device_1->bdev_file is freed\nbtrfs_close_bdev(btrfs_device_2)\nfput(btrfs_device_2->bdev_file)\n3. mount /dev/loop1 /mnt\nbtrfs_open_devices\nbtrfs_get_bdev_and_sb(&bdev_file)\n// EIO, btrfs_device_1->bdev_file is not assigned,\n// which points to a freed memory area\nbtrfs_device_2->bdev_file = btrfs_get_bdev_and_sb(loop1)\nbtrfs_fill_super\nopen_ctree\nbtrfs_free_extra_devids\nif (btrfs_device_1->bdev_file)\nfput(btrfs_device_1->bdev_file) // UAF !\nFix it by setting 'device->bdev_file' as 'NULL' after closing the\nbtrfs_device in btrfs_close_one_device()."], "name": "CVE-2024-50217", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "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": "2024-11-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50217\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50217\nhttps://lore.kernel.org/linux-cve-announce/2024110924-CVE-2024-50217-2815@gregkh/T"], "threat_severity": "Moderate"}

{}