{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53214", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T14:19:21.845Z", "datePublished": "2025-09-15T14:21:42.331Z", "dateUpdated": "2026-08-05T09:13:07.520Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:07.520Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid potential memory corruption in __update_iostat_latency()\n\nAdd iotype sanity check to avoid potential memory corruption.\nThis is to fix the compile error below:\n\nfs/f2fs/iostat.c:231 __update_iostat_latency() error: buffer overflow\n'io_lat->peak_lat[type]' 3 <= 3\n\nvim +228 fs/f2fs/iostat.c\n\n 211 static inline void __update_iostat_latency(struct bio_iostat_ctx\n\t*iostat_ctx,\n 212\t\t\t\t\tenum iostat_lat_type type)\n 213 {\n 214\t\tunsigned long ts_diff;\n 215\t\tunsigned int page_type = iostat_ctx->type;\n 216\t\tstruct f2fs_sb_info *sbi = iostat_ctx->sbi;\n 217\t\tstruct iostat_lat_info *io_lat = sbi->iostat_io_lat;\n 218\t\tunsigned long flags;\n 219\n 220\t\tif (!sbi->iostat_enable)\n 221\t\t\treturn;\n 222\n 223\t\tts_diff = jiffies - iostat_ctx->submit_ts;\n 224\t\tif (page_type >= META_FLUSH)\n ^^^^^^^^^^\n\n 225\t\t\tpage_type = META;\n 226\n 227\t\tspin_lock_irqsave(&sbi->iostat_lat_lock, flags);\n @228\t\tio_lat->sum_lat[type][page_type] += ts_diff;\n ^^^^^^^^^\nMixup between META_FLUSH and NR_PAGE_TYPE leads to memory corruption." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path runs in f2fs bio completion (`f2fs_write_end_io`/`f2fs_read_end_io` → `iostat_update_and_unbind_ctx` → `__update_iostat_latency`) after ordinary local file I/O on an f2fs volume (e.g. Android userdata); it is not reachable via network protocols or adjacent-link frames.\nAC:H - Corruption requires `iostat_enable` (defaults false) and `iostat_ctx->type == NR_PAGE_TYPE`, but every submit site only passes DATA/NODE/META/META_FLUSH and META_FLUSH is already remapped by the old `>= META_FLUSH` check, so the out-of-bounds index is not attacker-influencable.\nPR:L - In the worst reasonable deployment (f2fs already mounted, iostat enabled for diagnostics as the feature intends), unprivileged local users/apps can issue reads/writes that drive bio completion through the vulnerable function without needing init-namespace root.\nUI:N - On typical f2fs deployments such as Android userdata the filesystem is already mounted, and the attacker triggers I/O themselves with no separate victim action required.\nS:U - Impact is confined to host kernel heap/state within the same OS security authority; there is no VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - When the bad index is used with WRITE_ASYNC_IO, `bio_cnt[idx][iotype]++` performs a read-modify-write one `unsigned int` past the kmalloc'd `iostat_lat_info`, which per OOB/memory-corruption guidance can be leveraged for disclosure of adjacent heap contents.\nI:H - The same path is a real heap out-of-bounds write (and in-object corruption of `peak_lat`/`bio_cnt`), which per kernel CVSS guidance for OOB writes is Integrity High and can yield write/control-flow primitives.\nA:H - Heap corruption adjacent to `iostat_io_lat` can cause kernel oops/panic when corrupted neighboring objects are later used, matching Availability High for memory-corruption crashes." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/f2fs/iostat.c" ], "versions": [ { "version": "a4b6817625e71d5d4aee16cacf7a7fec077c6dbe", "lessThan": "aa4d726af72a21732ce120484e0b1240674a13b3", "status": "affected", "versionType": "git" }, { "version": "a4b6817625e71d5d4aee16cacf7a7fec077c6dbe", "lessThan": "22ddbbff116ee7dce5431feb1c0f36a507d2d68d", "status": "affected", "versionType": "git" }, { "version": "a4b6817625e71d5d4aee16cacf7a7fec077c6dbe", "lessThan": "20b4f3de0f3932f71b4a8daf0671e517a8d98022", "status": "affected", "versionType": "git" }, { "version": "a4b6817625e71d5d4aee16cacf7a7fec077c6dbe", "lessThan": "0dbbf0fb38d5ec5d4138d1aeaeb43d9217b9a592", "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/iostat.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.100", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.18", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.5", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "5.15.100" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/aa4d726af72a21732ce120484e0b1240674a13b3" }, { "url": "https://git.kernel.org/stable/c/22ddbbff116ee7dce5431feb1c0f36a507d2d68d" }, { "url": "https://git.kernel.org/stable/c/20b4f3de0f3932f71b4a8daf0671e517a8d98022" }, { "url": "https://git.kernel.org/stable/c/0dbbf0fb38d5ec5d4138d1aeaeb43d9217b9a592" } ], "title": "f2fs: fix to avoid potential memory corruption in __update_iostat_latency()", "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-2023-53214", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T17:48:59.388842Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T17:52:57.442Z" } } ] } }