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

Vulnerability from cvelistv5 – Published: 2024-10-21 11:53 – Updated: 2025-11-03 22:21
VLAI?
Title
ext4: avoid OOB when system.data xattr changes underneath the filesystem
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted 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)
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    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)
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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 \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."
        }
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      "title": "ext4: avoid OOB when system.data xattr changes underneath the filesystem",
      "x_generator": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47701",
    "datePublished": "2024-10-21T11:53:37.276Z",
    "dateReserved": "2024-09-30T16:00:12.945Z",
    "dateUpdated": "2025-11-03T22:21:07.345Z",
    "state": "PUBLISHED"
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filesystem\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"5b076d37e8d99918e9294bd6b35a8bbb436819b0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"8adf0eb4e361a9e060d54f4bd0ac9c5d85277d20\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"7fc22c3b3ffc0e952f5e0062dd11aa6ae76affba\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"be2e9b111e2790962cc66a177869b4e9717b4e29\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"ea32883e4a03ed575a2eb7a66542022312bde477\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"2a6579ef5f2576a940125729f7409cc182f1c8df\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"371d0bacecd529f887ea2547333d9173e7bcdc0a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"ccb8c18076e2e630fea23fbec583cdad61787fc5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e8e948e7802a2ab05c146d3e72a39b93b5718236\", \"lessThan\": \"c6b72f5d82b1017bad80f9ebf502832fc321d796\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/ext4/inline.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.323\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.285\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.227\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ext4/inline.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.323\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.285\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.227\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.54\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.13\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.2\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"3.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:37:48.380Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47701\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:21:07.345Z\", \"dateReserved\": \"2024-09-30T16:00:12.945Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T11:53:37.276Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.