CVE-2025-22019

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There is no network-facing path into `bch2_fs_file_ioctl()`.\nAC:L - The attacker deterministically triggers both defects with a single ioctl call \u2014 no race, no memory-layout dependence, no timing window; the dcache state that wedges `bch2_evict_subvolume_inodes()` is created by the attacker simply by walking into the subvolume beforehand. No conditions lie outside the attacker's control.\nPR:L - `BCH_IOCTL_SUBVOLUME_DESTROY` has no `capable()` check and, before this fix, no `inode_permission()` check, so an ordinary unprivileged local user needs only an fd on the bcachefs mount plus search (`MAY_EXEC`) permission along the path to the victim subvolume. No CAP_SYS_ADMIN, no user-namespace trick, and no ownership of or write access to the target is required.\nUI:N - The attacker issues the ioctl directly with no action by any other user; the mounted bcachefs filesystem is an ambient system configuration, not a victim-performed step at exploit time.\nS:U - The vulnerable code and the impacted resources (kernel filesystem state, on-disk subvolume data) are managed by the same security authority \u2014 the kernel. This is a standard in-kernel DAC-bypass/DoS with no VM, IOMMU, or sandbox boundary crossed.\nC:L - There is no direct arbitrary-read primitive, but the DAC bypass has bounded disclosure consequences: after destroying a root- or other-user-owned subvolume in a directory the attacker can write to, the attacker can recreate the path and have a privileged process deposit sensitive data into attacker-controlled storage, and the non-invalidated dcache subtree leaves stale dentries/inodes referencing a freed subvolume ID that can be reused by another user's newly created subvolume.\nI:H - An unprivileged user can permanently destroy any subvolume they can merely traverse to \u2014 including root-owned subvolumes and other users' mode-0700 subvolumes \u2014 bypassing all ownership, write-permission, sticky-bit and non-empty-directory protections, which is unauthorized destruction of arbitrary data on the filesystem. The stale, still-hashed dentry subtree over a deleted subvolume additionally permits writes through inodes whose subvolume ID may be reused.\nA:H - The `d_delete()` bug leaves `bch2_evict_subvolume_inodes()` stuck in `TASK_UNINTERRUPTIBLE`, producing an unkillable D-state kworker that holds `BCH_WRITE_REF_snapshot_delete_pagecache` forever \u2014 unmount and read-only transitions hang, all further subvolume deletions stall, and recovery requires a reboot. Independently, arbitrary destruction of subvolumes (e.g. one holding `/home` or a database) is total loss of the affected data."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/bcachefs/fs-ioctl.c"], "versions": [{"version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "lessThan": "9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8", "status": "affected", "versionType": "git"}, {"version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "lessThan": "82383abd39abd635511b8956284a5cc8134c4dc1", "status": "affected", "versionType": "git"}, {"version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "lessThan": "558317a5c61045d460a37372181e7b43c0c002bb", "status": "affected", "versionType": "git"}, {"version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "lessThan": "707549600c4a012ed71c0204a7992a679880bf33", "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/bcachefs/fs-ioctl.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.22", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13.10", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.14.2", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15", "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": "6.7", "versionEndExcluding": "6.12.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.13.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.14.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.15"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8"}, {"url": "https://git.kernel.org/stable/c/82383abd39abd635511b8956284a5cc8134c4dc1"}, {"url": "https://git.kernel.org/stable/c/558317a5c61045d460a37372181e7b43c0c002bb"}, {"url": "https://git.kernel.org/stable/c/707549600c4a012ed71c0204a7992a679880bf33"}], "title": "bcachefs: bch2_ioctl_subvolume_destroy() fixes", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/bcachefs/fs-ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8", "status": "affected", "version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "versionType": "git"}, {"lessThan": "82383abd39abd635511b8956284a5cc8134c4dc1", "status": "affected", "version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "versionType": "git"}, {"lessThan": "558317a5c61045d460a37372181e7b43c0c002bb", "status": "affected", "version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "versionType": "git"}, {"lessThan": "707549600c4a012ed71c0204a7992a679880bf33", "status": "affected", "version": "1c6fdbd8f2465ddfb73a01ec620cbf3d14044e1a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/bcachefs/fs-ioctl.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"lessThan": "6.7", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.22", "versionType": "semver"}, {"lessThanOrEqual": "6.13.*", "status": "unaffected", "version": "6.13.10", "versionType": "semver"}, {"lessThanOrEqual": "6.14.*", "status": "unaffected", "version": "6.14.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.15", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9F037D3C-D627-4151-8546-1A2E3C2B38A8", "versionEndExcluding": "6.12.22", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E9410CA0-CED8-49BE-9DB4-856654736C32", "versionEndExcluding": "6.13.10", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FADAE5D8-4808-442C-B218-77B2CE8780A0", "versionEndExcluding": "6.14.2", "versionStartIncluding": "6.14", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcachefs: bch2_ioctl_subvolume_destroy() fixes\n\nbch2_evict_subvolume_inodes() was getting stuck - due to incorrectly\npruning the dcache.\n\nAlso, fix missing permissions checks."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bcachefs: bch2_ioctl_subvolume_destroy() corrige el bloqueo de bch2_evict_subvolume_inodes() debido a una poda incorrecta de dcache. Tambi\u00e9n se corrigen las comprobaciones de permisos que faltaban."}], "id": "CVE-2025-22019", "lastModified": "2026-07-30T06:22:03.367", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-04-16T11:15:42.537", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/558317a5c61045d460a37372181e7b43c0c002bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/707549600c4a012ed71c0204a7992a679880bf33"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/82383abd39abd635511b8956284a5cc8134c4dc1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e6e83e1e2d01b99e70cd7812d7f758a8def9fc8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: bcachefs: bch2_ioctl_subvolume_destroy() fixes", "id": "2360104", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2360104"}, "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:\nbcachefs: bch2_ioctl_subvolume_destroy() fixes\nbch2_evict_subvolume_inodes() was getting stuck - due to incorrectly\npruning the dcache.\nAlso, fix missing permissions checks."], "name": "CVE-2025-22019", "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": "2025-04-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-22019\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-22019\nhttps://lore.kernel.org/linux-cve-announce/2025041640-CVE-2025-22019-e865@gregkh/T"], "threat_severity": "Moderate"}

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