{
  "cveId": "CVE-2023-52603",
  "url": "https://patchblox.com/security/cve/CVE-2023-52603",
  "summary": "CVE-2023-52603 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52603, released March 6, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  UBSAN: array-index-out-of-bounds in dtSplitRoot...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  UBSAN: array-index-out-of-bounds in dtSplitRoot  Syzkaller reported the following issue:  oop0: detected capacity change from 0 to 32768  UBSAN: array-index-out-of-bounds in fs/jfs/jfs_dtree.c:1971:9 index -2 is out of range for type \u0027struct dtslot [128]\u0027 CPU: 0 PID: 3613 Comm: syz-executor270 Not tainted 6.0.0-syzkaller-09423-g493ffd6605b2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace:  \u003CTASK\u003E  __dump_stack lib/dump_stack.c:88 [inline]  dump_stack_lvl\u002B0x1b1/0x28e lib/dump_stack.c:106  ubsan_epilogue lib/ubsan.c:151 [inline]  __ubsan_handle_out_of_bounds\u002B0xdb/0x130 lib/ubsan.c:283  dtSplitRoot\u002B0x8d8/0x1900 fs/jfs/jfs_dtree.c:1971  dtSplitUp fs/jfs/jfs_dtree.c:985 [inline]  dtInsert\u002B0x1189/0x6b80 fs/jfs/jfs_dtree.c:863  jfs_mkdir\u002B0x757/0xb00 fs/jfs/namei.c:270  vfs_mkdir\u002B0x3b3/0x590 fs/namei.c:4013  do_mkdirat\u002B0x279/0x550 fs/namei.c:4038  __do_sys_mkdirat fs/namei.c:4053 [inline]  __se_sys_mkdirat fs/namei.c:4051 [inline]  __x64_sys_mkdirat\u002B0x85/0x90 fs/namei.c:4051  do_syscall_x64 arch/x86/entry/common.c:50 [inline]  do_syscall_64\u002B0x3d/0xb0 arch/x86/entry/common.c:80  entry_SYSCALL_64_after_hwframe\u002B0x63/0xcd RIP: 0033:0x7fcdc0113fd9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffeb8bc67d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcdc0113fd9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007fcdc00d37a0 R08: 0000000000000000 R09: 00007fcdc00d37a0 R10: 00005555559a72c0 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 00083878000000f8 R15: 0000000000000000  \u003C/TASK\u003E  The issue is caused when the value of fsi becomes less than -1. The check to break the loop when fsi value becomes -1 is present but syzbot was able to produce value less than -1 which cause the error. This patch simply add the change for the values less than 0.  The patch is tested via syzbot.",
  "published": "2024-03-06T07:15:11Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00291,
  "epssPercentile": 0.21821,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.82-1",
      "fix": "DEBIAN-CVE-2023-52603",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52603",
      "released": "2024-03-06T07:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.7.7-1",
      "fix": "DEBIAN-CVE-2023-52603",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52603",
      "released": "2024-03-06T07:15:11Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.7.7-1",
      "fix": "DEBIAN-CVE-2023-52603",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52603",
      "released": "2024-03-06T07:15:11Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}