{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-47701",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-47701"
  ],
  "published": "2024-10-21T12:02:02Z",
  "summary": "ext4: avoid OOB when system.data xattr changes underneath the filesystem",
  "details": "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.",
  "affected": [
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        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.6.51-1+rpt1",
        "1:6.6.51-1+rpt2",
        "1:6.6.51-1+rpt3"
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-47701"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5b076d37e8d99918e9294bd6b35a8bbb436819b0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8adf0eb4e361a9e060d54f4bd0ac9c5d85277d20"
    },
    {
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      "url": "https://git.kernel.org/stable/c/7fc22c3b3ffc0e952f5e0062dd11aa6ae76affba"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/be2e9b111e2790962cc66a177869b4e9717b4e29"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ea32883e4a03ed575a2eb7a66542022312bde477"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2a6579ef5f2576a940125729f7409cc182f1c8df"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/371d0bacecd529f887ea2547333d9173e7bcdc0a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ccb8c18076e2e630fea23fbec583cdad61787fc5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c6b72f5d82b1017bad80f9ebf502832fc321d796"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
  }
}