{
  "cveId": "CVE-2023-52900",
  "url": "https://patchblox.com/security/cve/CVE-2023-52900",
  "summary": "CVE-2023-52900 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-52900, released August 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  nilfs2: fix general protection fault in nilfs_bt...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  nilfs2: fix general protection fault in nilfs_btree_insert()  If nilfs2 reads a corrupted disk image and tries to reads a b-tree node block by calling __nilfs_btree_get_block() against an invalid virtual block address, it returns -ENOENT because conversion of the virtual block address to a disk block address fails.  However, this return value is the same as the internal code that b-tree lookup routines return to indicate that the block being searched does not exist, so functions that operate on that b-tree may misbehave.  When nilfs_btree_insert() receives this spurious \u0027not found\u0027 code from nilfs_btree_do_lookup(), it misunderstands that the \u0027not found\u0027 check was successful and continues the insert operation using incomplete lookup path data, causing the following crash:   general protection fault, probably for non-canonical address  0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN  KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]  ...  RIP: 0010:nilfs_btree_get_nonroot_node fs/nilfs2/btree.c:418 [inline]  RIP: 0010:nilfs_btree_prepare_insert fs/nilfs2/btree.c:1077 [inline]  RIP: 0010:nilfs_btree_insert\u002B0x6d3/0x1c10 fs/nilfs2/btree.c:1238  Code: bc 24 80 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89  ff e8 4b 02 92 fe 4d 8b 3f 49 83 c7 28 4c 89 f8 48 c1 e8 03 \u003C42\u003E 80 3c  28 00 74 08 4c 89 ff e8 2e 02 92 fe 4d 8b 3f 49 83 c7 02  ...  Call Trace:  \u003CTASK\u003E   nilfs_bmap_do_insert fs/nilfs2/bmap.c:121 [inline]   nilfs_bmap_insert\u002B0x20d/0x360 fs/nilfs2/bmap.c:147   nilfs_get_block\u002B0x414/0x8d0 fs/nilfs2/inode.c:101   __block_write_begin_int\u002B0x54c/0x1a80 fs/buffer.c:1991   __block_write_begin fs/buffer.c:2041 [inline]   block_write_begin\u002B0x93/0x1e0 fs/buffer.c:2102   nilfs_write_begin\u002B0x9c/0x110 fs/nilfs2/inode.c:261   generic_perform_write\u002B0x2e4/0x5e0 mm/filemap.c:3772   __generic_file_write_iter\u002B0x176/0x400 mm/filemap.c:3900   generic_file_write_iter\u002B0xab/0x310 mm/filemap.c:3932   call_write_iter include/linux/fs.h:2186 [inline]   new_sync_write fs/read_write.c:491 [inline]   vfs_write\u002B0x7dc/0xc50 fs/read_write.c:584   ksys_write\u002B0x177/0x2a0 fs/read_write.c:637   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  ...  \u003C/TASK\u003E  This patch fixes the root cause of this problem by replacing the error code that __nilfs_btree_get_block() returns on block address conversion failure from -ENOENT to another internal code -EINVAL which means that the b-tree metadata is corrupted.  By returning -EINVAL, it propagates without glitches, and for all relevant b-tree operations, functions in the upper bmap layer output an error message indicating corrupted b-tree metadata via nilfs_bmap_convert_error(), and code -EIO will be eventually returned as it should be.",
  "published": "2024-08-21T07:15:06Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00241,
  "epssPercentile": 0.15257,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2023-52900",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52900",
      "released": "2024-08-21T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2023-52900",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52900",
      "released": "2024-08-21T07:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.8-1",
      "fix": "DEBIAN-CVE-2023-52900",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-52900",
      "released": "2024-08-21T07:15:06Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}