473 lines
25 KiB
JSON
473 lines
25 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-47701",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-09-30T16:00:12.945Z",
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"datePublished": "2024-10-21T11:53:37.276Z",
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"dateUpdated": "2026-10-15T00:51:53.206Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:39:32.569Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid OOB when system.data xattr changes underneath the filesystem\n\nWhen looking up for an entry in an inlined directory, if e_value_offs is\nchanged underneath the filesystem by some change in the block device, it\nwill lead to an out-of-bounds access that KASAN detects as an UAF.\n\nEXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.\nloop0: detected capacity change from 2048 to 2047\n==================================================================\nBUG: KASAN: use-after-free in ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500\nRead of size 1 at addr ffff88803e91130f by task syz-executor269/5103\n\nCPU: 0 UID: 0 PID: 5103 Comm: syz-executor269 Not tainted 6.11.0-rc4-syzkaller #0\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:93 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500\n ext4_find_inline_entry+0x4be/0x5e0 fs/ext4/inline.c:1697\n __ext4_find_entry+0x2b4/0x1b30 fs/ext4/namei.c:1573\n ext4_lookup_entry fs/ext4/namei.c:1727 [inline]\n ext4_lookup+0x15f/0x750 fs/ext4/namei.c:1795\n lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1633\n filename_create+0x297/0x540 fs/namei.c:3980\n do_symlinkat+0xf9/0x3a0 fs/namei.c:4587\n __do_sys_symlinkat fs/namei.c:4610 [inline]\n __se_sys_symlinkat fs/namei.c:4607 [inline]\n __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4607\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f3e73ced469\nCode: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007fff4d40c258 EFLAGS: 00000246 ORIG_RAX: 000000000000010a\nRAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f3e73ced469\nRDX: 0000000020000200 RSI: 00000000ffffff9c RDI: 00000000200001c0\nRBP: 0000000000000000 R08: 00007fff4d40c290 R09: 00007fff4d40c290\nR10: 0023706f6f6c2f76 R11: 0000000000000246 R12: 00007fff4d40c27c\nR13: 0000000000000003 R14: 431bde82d7b634db R15: 00007fff4d40c2b0\n </TASK>\n\nCalling ext4_xattr_ibody_find right after reading the inode with\next4_get_inode_loc will lead to a check of the validity of the xattrs,\navoiding this problem."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached through ordinary local filesystem syscalls (symlinkat/open/rename/unlink triggering ext4_lookup → __ext4_find_entry → ext4_find_inline_entry) on a mounted ext4 image whose backing store the attacker can modify. No network or remote protocol is involved.\nAC:L - The attacker controls both halves: the on-disk xattr bytes (backing file/removable device they own) and the cache invalidation that forces the stale inode block to be re-read (loop capacity change, BLKFLSBUF, or induced memory pressure), then issues the lookup at will; syzbot reproduces it deterministically with a C reproducer.\nPR:L - An unprivileged local user can loop-mount their own ext4 image on typical desktop/CI systems (udisks2 loop-setup and filesystem-mount are allow_active) or supply auto-mounted removable media, and retains write access to the backing store; the lookup that triggers the OOB requires no privileges at all.\nUI:N - In the automount/self-mount scenario the attacker performs every step themselves — attach or loop-mount the image, mutate the backing bytes, invalidate the cache, then look up a name — with no action required from any other user.\nS:U - The out-of-bounds access and its consequences are confined to the kernel's own memory and the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - e_value_offs is a 16-bit attacker-chosen value, so ext4_search_dir reads up to ~64KB past the inode-table buffer into adjacent slab/page-cache memory; the same unvalidated offset is used by ext4_read_inline_data's memcpy, and matched \"directory entries\" expose adjacent kernel memory contents (names, inode numbers) to userspace.\nI:H - The out-of-bounds entry pointer is handed to writers — ext4_setent() stores an attacker-chosen inode number plus file_type at that address during rename, and ext4_generic_delete_entry() zeroes/rewrites it on unlink — giving a semi-controlled out-of-bounds kernel write that is leverageable against heap-sprayed adjacent objects.\nA:H - The out-of-bounds access is reported by KASAN as a use-after-free read and can hit unmapped or poisoned memory and corrupt neighbouring kernel objects, resulting in an oops or panic that takes down the whole system."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ext4/inline.c"
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],
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{
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"version": "0",
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}
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],
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"title": "ext4: avoid OOB when system.data xattr changes underneath the filesystem",
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}
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"metrics": [
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{
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"version": "2.0.3",
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"timestamp": "2024-10-21T13:04:32.824362Z"
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}
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"dateUpdated": "2024-10-21T13:14:13.562Z"
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},
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"title": "CVE Program Container",
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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}
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{
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T00:51:53.206Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
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"versions": [
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{
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"status": "affected",
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{
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"versions": [
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{
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.0",
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
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"versions": [
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{
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"status": "affected",
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"version": "V3.1.0",
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"lessThan": "V3.1.5",
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|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V1.1.1",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "V3.1.0",
|
|
"lessThan": "V3.1.5",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "RUGGEDCOM RST2428P",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V3.2",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V3.2",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
},
|
|
{
|
|
"vendor": "Siemens",
|
|
"product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family",
|
|
"versions": [
|
|
{
|
|
"status": "affected",
|
|
"version": "0",
|
|
"lessThan": "V3.2",
|
|
"versionType": "custom"
|
|
}
|
|
],
|
|
"defaultStatus": "unknown"
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-398330.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
|
|
},
|
|
{
|
|
"url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
} |