Vulnerability-Lookup

FKIE_CVE-2024-47701

Vulnerability from fkie_nvd - Published: 2024-10-21 12:15 - Updated: 2026-08-04 11:20

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: avoid OOB when system.data xattr changes underneath the filesystem When looking up for an entry in an inlined directory, if e_value_offs is changed underneath the filesystem by some change in the block device, it will lead to an out-of-bounds access that KASAN detects as an UAF. EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. loop0: detected capacity change from 2048 to 2047 ================================================================== BUG: KASAN: use-after-free in ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 Read of size 1 at addr ffff88803e91130f by task syz-executor269/5103 CPU: 0 UID: 0 PID: 5103 Comm: syz-executor269 Not tainted 6.11.0-rc4-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 ext4_find_inline_entry+0x4be/0x5e0 fs/ext4/inline.c:1697 __ext4_find_entry+0x2b4/0x1b30 fs/ext4/namei.c:1573 ext4_lookup_entry fs/ext4/namei.c:1727 [inline] ext4_lookup+0x15f/0x750 fs/ext4/namei.c:1795 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1633 filename_create+0x297/0x540 fs/namei.c:3980 do_symlinkat+0xf9/0x3a0 fs/namei.c:4587 __do_sys_symlinkat fs/namei.c:4610 [inline] __se_sys_symlinkat fs/namei.c:4607 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3e73ced469 Code: 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 RSP: 002b:00007fff4d40c258 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f3e73ced469 RDX: 0000000020000200 RSI: 00000000ffffff9c RDI: 00000000200001c0 RBP: 0000000000000000 R08: 00007fff4d40c290 R09: 00007fff4d40c290 R10: 0023706f6f6c2f76 R11: 0000000000000246 R12: 00007fff4d40c27c R13: 0000000000000003 R14: 431bde82d7b634db R15: 00007fff4d40c2b0 </TASK> Calling ext4_xattr_ibody_find right after reading the inode with ext4_get_inode_loc will lead to a check of the validity of the xattrs, avoiding this problem.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2a6579ef5f2576a940125729f7409cc182f1c8df	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/371d0bacecd529f887ea2547333d9173e7bcdc0a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5b076d37e8d99918e9294bd6b35a8bbb436819b0
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7fc22c3b3ffc0e952f5e0062dd11aa6ae76affba	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8adf0eb4e361a9e060d54f4bd0ac9c5d85277d20
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/be2e9b111e2790962cc66a177869b4e9717b4e29	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c6b72f5d82b1017bad80f9ebf502832fc321d796	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ccb8c18076e2e630fea23fbec583cdad61787fc5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ea32883e4a03ed575a2eb7a66542022312bde477	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-265688.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-355557.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
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      "affectedData": [
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              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
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          "product": "RUGGEDCOM RST2428P",
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          "vendor": "Siemens",
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          "vendor": "Siemens",
          "versions": [
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          "vendor": "Siemens",
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          "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
          "vendor": "Siemens",
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              "status": "affected",
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      ],
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
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      "nodes": [
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            {
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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 \u003cTASK\u003e\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 \u003c48\u003e 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 \u003c/TASK\u003e\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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: evitar OOB cuando system.data xattr cambia debajo del sistema de archivos Al buscar una entrada en un directorio en l\u00ednea, si e_value_offs se cambia debajo del sistema de archivos por alg\u00fan cambio en el dispositivo de bloque, conducir\u00e1 a un acceso fuera de los l\u00edmites que KASAN detecta como un UAF. EXT4-fs (loop0): sistema de archivos montado 00000000-0000-0000-0000-00000000000 r/w sin diario. Modo de cuota: ninguno. loop0: se detect\u00f3 un cambio de capacidad de 2048 a 2047 ======================================================================= ERROR: KASAN: use after free en ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 Lectura de tama\u00f1o 1 en la direcci\u00f3n ffff88803e91130f por la tarea syz-executor269/5103 CPU: 0 UID: 0 PID: 5103 Comm: syz-executor269 No contaminado 6.11.0-rc4-syzkaller #0 Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 01/04/2014 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:93 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [en l\u00ednea] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 ext4_search_dir+0xf2/0x1c0 fs/ext4/namei.c:1500 ext4_find_inline_entry+0x4be/0x5e0 fs/ext4/inline.c:1697 __ext4_find_entry+0x2b4/0x1b30 fs/ext4/namei.c:1573 ext4_lookup_entry fs/ext4/namei.c:1727 [en l\u00ednea] ext4_lookup+0x15f/0x750 fs/ext4/namei.c:1795 lookup_one_qstr_excl+0x11f/0x260 fs/namei.c:1633 filename_create+0x297/0x540 fs/namei.c:3980 do_symlinkat+0xf9/0x3a0 fs/namei.c:4587 __do_sys_symlinkat fs/namei.c:4610 [en l\u00ednea] __se_sys_symlinkat fs/namei.c:4607 [en l\u00ednea] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4607 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3e73ced469 C\u00f3digo: 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 \u0026lt;48\u0026gt; 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff4d40c258 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f3e73ced469 RDX: 0000000020000200 RSI: 00000000ffffff9c RDI: 00000000200001c0 RBP: 0000000000000000 R08: 00007fff4d40c290 R09: 00007fff4d40c290 R10: 0023706f6f6c2f76 R11: 0000000000000246 R12: 00007fff4d40c27c R13: 0000000000000003 R14: 431bde82d7b634db R15: 00007fff4d40c2b0  Llamada ext4_xattr_ibody_find justo despu\u00e9s de leer el inodo con ext4_get_inode_loc conducir\u00e1 a una verificaci\u00f3n de la validez de los xattrs, evitando este problema."
    }
  ],
  "id": "CVE-2024-47701",
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}

CVE-2024-47701 (GCVE-0-2024-47701)

Vulnerability from cvelistv5 – Published: 2024-10-21 11:53 – Updated: 2026-08-05 11:39

Title

ext4: avoid OOB when system.data xattr changes underneath the filesystem

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-10-21 13:04 UTC

Assigner

Linux mitre root Scorecard

References

14 references

URL	Tags
https://git.kernel.org/stable/c/5b076d37e8d99918e…
https://git.kernel.org/stable/c/8adf0eb4e361a9e06…
https://git.kernel.org/stable/c/7fc22c3b3ffc0e952…
https://git.kernel.org/stable/c/be2e9b111e2790962…
https://git.kernel.org/stable/c/ea32883e4a03ed575…
https://git.kernel.org/stable/c/2a6579ef5f2576a94…
https://git.kernel.org/stable/c/371d0bacecd529f88…
https://git.kernel.org/stable/c/ccb8c18076e2e630f…
https://git.kernel.org/stable/c/c6b72f5d82b1017ba…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

9 products

Vendor	Product	Version
Linux	Linux	Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < 5b076d37e8d99918e9294bd6b35a8bbb436819b0 (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < 8adf0eb4e361a9e060d54f4bd0ac9c5d85277d20 (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < 7fc22c3b3ffc0e952f5e0062dd11aa6ae76affba (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < be2e9b111e2790962cc66a177869b4e9717b4e29 (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < ea32883e4a03ed575a2eb7a66542022312bde477 (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < 2a6579ef5f2576a940125729f7409cc182f1c8df (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < 371d0bacecd529f887ea2547333d9173e7bcdc0a (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < ccb8c18076e2e630fea23fbec583cdad61787fc5 (git) Affected: e8e948e7802a2ab05c146d3e72a39b93b5718236 , < c6b72f5d82b1017bad80f9ebf502832fc321d796 (git)
Linux	Linux	Affected: 3.8 Unaffected: 0 , < 3.8 (semver) Unaffected: 4.19.323 , ≤ 4.19.* (semver) Unaffected: 5.4.285 , ≤ 5.4.* (semver) Unaffected: 5.10.227 , ≤ 5.10.* (semver) Unaffected: 5.15.168 , ≤ 5.15.* (semver) Unaffected: 6.1.113 , ≤ 6.1.* (semver) Unaffected: 6.6.54 , ≤ 6.6.* (semver) Unaffected: 6.10.13 , ≤ 6.10.* (semver) Unaffected: 6.11.2 , ≤ 6.11.* (semver) Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Siemens	RUGGEDCOM RST2428P	Affected: 0 , < V3.2 (custom)
Siemens	SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family	Affected: 0 , < V3.2 (custom)
Siemens	SCALANCE XCM-/XRM-/XCH-/XRH-300 family	Affected: 0 , < V3.2 (custom)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

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To clipboard

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        {
          "lang": "en",
          "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 \u003cTASK\u003e\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 \u003c48\u003e 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 \u003c/TASK\u003e\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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable path is reached through ordinary local filesystem syscalls (symlinkat/open/rename/unlink triggering ext4_lookup \u2192 __ext4_find_entry \u2192 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 \u2014 attach or loop-mount the image, mutate the backing bytes, invalidate the cache, then look up a name \u2014 with no action required from any other user.\nS:U - The out-of-bounds access and its consequences are confined to the kernel\u0027s 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\u0027s 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 \u2014 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 \u2014 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:39:32.569Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5b076d37e8d99918e9294bd6b35a8bbb436819b0"
        },
        {
          "url": "https://git.kernel.org/stable/c/8adf0eb4e361a9e060d54f4bd0ac9c5d85277d20"
        },
        {
          "url": "https://git.kernel.org/stable/c/7fc22c3b3ffc0e952f5e0062dd11aa6ae76affba"
        },
        {
          "url": "https://git.kernel.org/stable/c/be2e9b111e2790962cc66a177869b4e9717b4e29"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea32883e4a03ed575a2eb7a66542022312bde477"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a6579ef5f2576a940125729f7409cc182f1c8df"
        },
        {
          "url": "https://git.kernel.org/stable/c/371d0bacecd529f887ea2547333d9173e7bcdc0a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ccb8c18076e2e630fea23fbec583cdad61787fc5"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6b72f5d82b1017bad80f9ebf502832fc321d796"
        }
      ],
      "title": "ext4: avoid OOB when system.data xattr changes underneath the filesystem",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47701",
    "datePublished": "2024-10-21T11:53:37.276Z",
    "dateReserved": "2024-09-30T16:00:12.945Z",
    "dateUpdated": "2026-08-05T11:39:32.569Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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FKIE_CVE-2024-47701

CVE-2024-47701 (GCVE-0-2024-47701)

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