{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-54187", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:44.497Z", "datePublished": "2025-12-30T12:08:56.562Z", "dateUpdated": "2026-08-05T09:17:54.804Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:17:54.804Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix potential corruption when moving a directory\n\nF2FS has the same issue in ext4_rename causing crash revealed by\nxfstests/generic/707.\n\nSee also commit 0813299c586b (\"ext4: Fix possible corruption when moving a directory\")" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached through the ordinary rename()/renameat2() syscall on a locally mounted f2fs filesystem, requiring local system access. No network protocol handler is involved.\nAC:L - The attacker controls both sides of the race — one thread issues the cross-directory rename while another creates entries in the moved directory to force inline-to-normal dentry conversion — and the unprotected window spans f2fs_balance_fs() (which can run GC and block for a long time), f2fs_lock_op() and f2fs_add_link(), making it wide and retryable indefinitely.\nPR:L - Any unprivileged local user with write access to two directories on an f2fs mount can trigger this; on Android every app has writable directories on the f2fs /data partition, and inline_dentry is enabled by default in default_options().\nUI:N - The attacker performs both the rename and the concurrent directory-modifying operations itself; no victim action is needed on an already-mounted filesystem.\nS:U - The corruption stays within the kernel/filesystem security authority; there is no crossing into a hypervisor, IOMMU, or other separate security scope.\nC:H - The stale write lands inside the inode's i_addr[] block-address array, planting an attacker-influenced physical block number into the directory, so subsequent readdir/lookup reads and exposes disk blocks belonging to other users' files.\nI:H - This is persistent on-disk metadata corruption — an attacker-influenced 32-bit value is written into a directory inode's block pointer and marked dirty, causing later directory writes to overwrite blocks owned by other files and producing double-allocated blocks requiring fsck.\nA:H - The commit states the race causes a crash (reproduced by xfstests/generic/707), and the resulting mismatched page-type writeback wait can hang under the page lock while the corrupted metadata triggers -EFSCORRUPTED/SBI_NEED_FSCK filesystem shutdown." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/f2fs/namei.c" ], "versions": [ { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "3e77036246123ff710fa2661dcaa12a45284f09b", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "957904f531fd857a92743b11fbc9c9ffdf7f3207", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "8f57f3e112cf1d16682b6ff9c31c72f40f7da9c9", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "8a0b544b7caedfbc05065b6377fd1d8bf7ef5e70", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "f20191100952013f0916418cdaed0ab55c7b634c", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "0a76082a4a32a90d1ef33dee8b400efc082b4b6f", "status": "affected", "versionType": "git" }, { "version": "622f28ae9ba4fa89b4ff0f4a6cf75d153ea838ce", "lessThan": "d94772154e524b329a168678836745d2773a6e02", "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/f2fs/namei.c" ], "versions": [ { "version": "3.19", "status": "affected" }, { "version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.243", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.180", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.112", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.29", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.16", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3.3", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4", "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": "3.19", "versionEndExcluding": "5.4.243" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.10.180" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "5.15.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.1.29" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.2.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.3.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/3e77036246123ff710fa2661dcaa12a45284f09b" }, { "url": "https://git.kernel.org/stable/c/957904f531fd857a92743b11fbc9c9ffdf7f3207" }, { "url": "https://git.kernel.org/stable/c/8f57f3e112cf1d16682b6ff9c31c72f40f7da9c9" }, { "url": "https://git.kernel.org/stable/c/8a0b544b7caedfbc05065b6377fd1d8bf7ef5e70" }, { "url": "https://git.kernel.org/stable/c/f20191100952013f0916418cdaed0ab55c7b634c" }, { "url": "https://git.kernel.org/stable/c/0a76082a4a32a90d1ef33dee8b400efc082b4b6f" }, { "url": "https://git.kernel.org/stable/c/d94772154e524b329a168678836745d2773a6e02" } ], "title": "f2fs: fix potential corruption when moving a directory", "x_generator": { "engine": "bippy-1.2.0" } } } }