{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50869", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:07.136Z", "datePublished": "2025-12-30T12:15:39.879Z", "dateUpdated": "2026-08-05T08:59:54.196Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:59:54.196Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: Fix slab-out-of-bounds in r_page\n\nWhen PAGE_SIZE is 64K, if read_log_page is called by log_read_rst for\nthe first time, the size of *buffer would be equal to\nDefaultLogPageSize(4K).But for *buffer operations like memcpy,\nif the memory area size(n) which being assigned to buffer is larger\nthan 4K (log->page_size(64K) or bytes(64K-page_off)), it will cause\nan out of boundary error.\n Call trace:\n [...]\n kasan_report+0x44/0x130\n check_memory_region+0xf8/0x1a0\n memcpy+0xc8/0x100\n ntfs_read_run_nb+0x20c/0x460\n read_log_page+0xd0/0x1f4\n log_read_rst+0x110/0x75c\n log_replay+0x1e8/0x4aa0\n ntfs_loadlog_and_replay+0x290/0x2d0\n ntfs_fill_super+0x508/0xec0\n get_tree_bdev+0x1fc/0x34c\n [...]\n\nFix this by setting variable r_page to NULL in log_read_rst." } ], "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 bug is reached only by presenting a crafted NTFS volume to the in-kernel ntfs3 driver so mount runs ntfs_fill_super→ntfs_loadlog_and_replay→log_replay→log_read_rst→read _log_page; this is a local block-device/loop/USB image path with no network protocol handler.\nAC:L - On 16K/64K PAGE_SIZE kernels log->page_size exceeds the fixed 4K r_page allocation so the first read_log_page deterministically overflows; on 4K kernels a crafted on-disk sys_page_size < 4096 takes the realloc path and overflows the same way, with no race or uncontrollable layout dependency.\nPR:N - The attacker needs no account on the target—the payload is solely a malicious NTFS image (USB stick, disk image, or media handed to udisks2/automount on desktops, kiosks, Android, or automotive systems), matching other ntfs3 image-parsing scores.\nUI:R - Someone must mount the volume or insert the media into a system that automounts it; ntfs3 is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so an unprivileged userns cannot mount it alone.\nS:U - The slab out-of-bounds write corrupts host kernel heap within the same security authority as the mounting kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - ntfs_read_run_nb memcpy's up to tens of KiB of attacker-controlled $LogFile bytes past a 4K slab object into adjacent heap, enabling classic heap-overlap disclosure primitives consistent with memory-corruption guidance.\nI:H - This is a large attacker-controlled slab out-of-bounds write (disk contents into undersized r_page), providing a heap write primitive suitable for adjacent-object corruption and control-flow hijack.\nA:H - The commit's KASAN stack shows a slab-out-of-bounds fault in ntfs_read_run_nb during mount that oopses/panics the kernel, fully denying availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/ntfs3/fslog.c" ], "versions": [ { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "ed686e7a26dd19ae6b46bb662f735acfa88ff7bc", "status": "affected", "versionType": "git" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "bf86a640a34947d92062996e1a75b9cd9d83dd19", "status": "affected", "versionType": "git" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "6d076293e5bffdf897ea5f975669206e09beed6a", "status": "affected", "versionType": "git" }, { "version": "b46acd6a6a627d876898e1c84d3f84902264b445", "lessThan": "ecfbd57cf9c5ca225184ae266ce44ae473792132", "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/fslog.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.87", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.17", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.3", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "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": "5.15.87" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.0.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ed686e7a26dd19ae6b46bb662f735acfa88ff7bc" }, { "url": "https://git.kernel.org/stable/c/bf86a640a34947d92062996e1a75b9cd9d83dd19" }, { "url": "https://git.kernel.org/stable/c/6d076293e5bffdf897ea5f975669206e09beed6a" }, { "url": "https://git.kernel.org/stable/c/ecfbd57cf9c5ca225184ae266ce44ae473792132" } ], "title": "fs/ntfs3: Fix slab-out-of-bounds in r_page", "x_generator": { "engine": "bippy-1.2.0" } } } }