{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38713", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.033Z", "datePublished": "2025-09-04T15:33:03.464Z", "dateUpdated": "2026-08-05T12:04:11.569Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:04:11.569Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()\n\nThe hfsplus_readdir() method is capable to crash by calling\nhfsplus_uni2asc():\n\n[ 667.121659][ T9805] ==================================================================\n[ 667.122651][ T9805] BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x902/0xa10\n[ 667.123627][ T9805] Read of size 2 at addr ffff88802592f40c by task repro/9805\n[ 667.124578][ T9805]\n[ 667.124876][ T9805] CPU: 3 UID: 0 PID: 9805 Comm: repro Not tainted 6.16.0-rc3 #1 PREEMPT(full)\n[ 667.124886][ T9805] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[ 667.124890][ T9805] Call Trace:\n[ 667.124893][ T9805] \n[ 667.124896][ T9805] dump_stack_lvl+0x10e/0x1f0\n[ 667.124911][ T9805] print_report+0xd0/0x660\n[ 667.124920][ T9805] ? __virt_addr_valid+0x81/0x610\n[ 667.124928][ T9805] ? __phys_addr+0xe8/0x180\n[ 667.124934][ T9805] ? hfsplus_uni2asc+0x902/0xa10\n[ 667.124942][ T9805] kasan_report+0xc6/0x100\n[ 667.124950][ T9805] ? hfsplus_uni2asc+0x902/0xa10\n[ 667.124959][ T9805] hfsplus_uni2asc+0x902/0xa10\n[ 667.124966][ T9805] ? hfsplus_bnode_read+0x14b/0x360\n[ 667.124974][ T9805] hfsplus_readdir+0x845/0xfc0\n[ 667.124984][ T9805] ? __pfx_hfsplus_readdir+0x10/0x10\n[ 667.124994][ T9805] ? stack_trace_save+0x8e/0xc0\n[ 667.125008][ T9805] ? iterate_dir+0x18b/0xb20\n[ 667.125015][ T9805] ? trace_lock_acquire+0x85/0xd0\n[ 667.125022][ T9805] ? lock_acquire+0x30/0x80\n[ 667.125029][ T9805] ? iterate_dir+0x18b/0xb20\n[ 667.125037][ T9805] ? down_read_killable+0x1ed/0x4c0\n[ 667.125044][ T9805] ? putname+0x154/0x1a0\n[ 667.125051][ T9805] ? __pfx_down_read_killable+0x10/0x10\n[ 667.125058][ T9805] ? apparmor_file_permission+0x239/0x3e0\n[ 667.125069][ T9805] iterate_dir+0x296/0xb20\n[ 667.125076][ T9805] __x64_sys_getdents64+0x13c/0x2c0\n[ 667.125084][ T9805] ? __pfx___x64_sys_getdents64+0x10/0x10\n[ 667.125091][ T9805] ? __x64_sys_openat+0x141/0x200\n[ 667.125126][ T9805] ? __pfx_filldir64+0x10/0x10\n[ 667.125134][ T9805] ? do_user_addr_fault+0x7fe/0x12f0\n[ 667.125143][ T9805] do_syscall_64+0xc9/0x480\n[ 667.125151][ T9805] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 667.125158][ T9805] RIP: 0033:0x7fa8753b2fc9\n[ 667.125164][ T9805] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 48\n[ 667.125172][ T9805] RSP: 002b:00007ffe96f8e0f8 EFLAGS: 00000217 ORIG_RAX: 00000000000000d9\n[ 667.125181][ T9805] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa8753b2fc9\n[ 667.125185][ T9805] RDX: 0000000000000400 RSI: 00002000000063c0 RDI: 0000000000000004\n[ 667.125190][ T9805] RBP: 00007ffe96f8e110 R08: 00007ffe96f8e110 R09: 00007ffe96f8e110\n[ 667.125195][ T9805] R10: 0000000000000000 R11: 0000000000000217 R12: 0000556b1e3b4260\n[ 667.125199][ T9805] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[ 667.125207][ T9805] \n[ 667.125210][ T9805]\n[ 667.145632][ T9805] Allocated by task 9805:\n[ 667.145991][ T9805] kasan_save_stack+0x20/0x40\n[ 667.146352][ T9805] kasan_save_track+0x14/0x30\n[ 667.146717][ T9805] __kasan_kmalloc+0xaa/0xb0\n[ 667.147065][ T9805] __kmalloc_noprof+0x205/0x550\n[ 667.147448][ T9805] hfsplus_find_init+0x95/0x1f0\n[ 667.147813][ T9805] hfsplus_readdir+0x220/0xfc0\n[ 667.148174][ T9805] iterate_dir+0x296/0xb20\n[ 667.148549][ T9805] __x64_sys_getdents64+0x13c/0x2c0\n[ 667.148937][ T9805] do_syscall_64+0xc9/0x480\n[ 667.149291][ T9805] entry_SYSCALL_64_after_hwframe+0x77/0x7f\n[ 667.149809][ T9805]\n[ 667.150030][ T9805] The buggy address belongs to the object at ffff88802592f000\n[ 667.150030][ T9805] which belongs to the cache kmalloc-2k of size 2048\n[ 667.151282][ T9805] The buggy address is located 0 bytes to the right of\n[ 667.151282][ T9805] allocated 1036-byte region [ffff88802592f000, ffff88802592f40c)\n[ 667.1\n---truncated---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only by mounting an attacker-authored HFS+ volume (loop-backed image or removable media) and then issuing ordinary local syscalls — `getdents64(2)` via `hfsplus_readdir()` or `listxattr(2)` via `hfsplus_listxattr()`. There is no network-facing consumer of fs/hfsplus/unicode.c.\nAC:L - The overread length is the raw 16-bit `hfsplus_unistr.length` field the attacker writes into the Catalog/Attributes b-tree node, so a single purpose-built image triggers it deterministically on the first `readdir`, with no race, timing window, or memory-layout precondition outside the attacker's control. Adjacent kmalloc-2k contents can be groomed by repeated allocations before the directory read.\nPR:L - hfsplus is FS_REQUIRES_DEV without FS_USERNS_MOUNT, so a bare mount(2) needs CAP_SYS_ADMIN, but in the most severe reasonable deployment an unprivileged local user routinely gets a crafted HFS+ image mounted through udisks2 loop-setup, desktop/kiosk removable-media automounters, or `user`/autofs fstab delegation. Once mounted, the getdents64 or listxattr that fires the overread requires no privilege at all.\nUI:N - The attacker performs every step personally — presents the crafted volume, which an automounter consumes with no human action, and then runs the directory read itself. No second victim user has to be induced into any action.\nS:U - The out-of-bounds access occurs in HFS+ unicode conversion inside the kernel and its effects remain within that same kernel security authority. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The loop stops only when the 1530-byte output buffer fills, so it reads up to ~3 KB past the 1036-byte `hfs_find_init()` key allocation — through the object tail and into neighbouring kmalloc-2k objects — and every harvested byte is handed to `dir_emit()`/`copy_name()` and returned to userspace as a filename or xattr name. That is a repeatable, attacker-length-controlled kernel heap disclosure primitive suitable for defeating KASLR and lifting secrets from groomed adjacent slab objects.\nI:N - The defect is strictly a read overrun; every store through `op` remains bounded by the remaining output length enforced by `nls->uni2char`, and the `-EINVAL` fallback stays inside the `+1` slack of `strbuf`. No kernel memory is modified.\nA:H - The multi-kilobyte overread can walk off the end of the slab page into unmapped memory, faulting in the middle of `iterate_dir()` while the btree mutex and inode lock are held, which oopses and wedges the filesystem; under KASAN, SLUB_DEBUG, or debug_pagealloc — common in hardened, appliance, and embedded builds — it faults immediately, and with panic_on_oops it is a full system panic the attacker can repeat at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/hfsplus/unicode.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "73f7da507d787b489761a0fa280716f84fa32b2f", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "76a4c6636a69d69409aa253b049b1be717a539c5", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ccf0ad56a779e6704c0b27f555dec847f50c7557", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "13604b1d7e7b125fb428cddbec6b8d92baad25d5", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "291bb5d931c6f3cd7227b913302a17be21cf53b0", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f7534cbfac0a9ffa4fa17cacc6e8b6446dae24ee", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6f93694bcbc2c2ab3e01cd8fba2f296faf34e6b9", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1ca69007e52a73bd8b84b988b61b319816ca8b01", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "94458781aee6045bd3d0ad4b80b02886b9e2219b", "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/hfsplus/unicode.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.149", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.103", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.43", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.11", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.2", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "2.6.12", "versionEndExcluding": "5.4.297" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.149" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.43" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.15.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.16.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/73f7da507d787b489761a0fa280716f84fa32b2f" }, { "url": "https://git.kernel.org/stable/c/76a4c6636a69d69409aa253b049b1be717a539c5" }, { "url": "https://git.kernel.org/stable/c/ccf0ad56a779e6704c0b27f555dec847f50c7557" }, { "url": "https://git.kernel.org/stable/c/13604b1d7e7b125fb428cddbec6b8d92baad25d5" }, { "url": "https://git.kernel.org/stable/c/291bb5d931c6f3cd7227b913302a17be21cf53b0" }, { "url": "https://git.kernel.org/stable/c/f7534cbfac0a9ffa4fa17cacc6e8b6446dae24ee" }, { "url": "https://git.kernel.org/stable/c/6f93694bcbc2c2ab3e01cd8fba2f296faf34e6b9" }, { "url": "https://git.kernel.org/stable/c/1ca69007e52a73bd8b84b988b61b319816ca8b01" }, { "url": "https://git.kernel.org/stable/c/94458781aee6045bd3d0ad4b80b02886b9e2219b" } ], "title": "hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:41:44.035Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T12:05:48.205Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC CN 4100", "versions": [ { "status": "affected", "version": "0", "lessThan": "V5.0", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-032379.html" } ] } ] } }