{
  "cveId": "CVE-2022-48631",
  "url": "https://patchblox.com/security/cve/CVE-2022-48631",
  "summary": "CVE-2022-48631 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48631, released April 28, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  ext4: fix bug in extents parsing when eh_entries...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  ext4: fix bug in extents parsing when eh_entries == 0 and eh_depth \u003E 0  When walking through an inode extents, the ext4_ext_binsearch_idx() function assumes that the extent header has been previously validated.  However, there are no checks that verify that the number of entries (eh-\u003Eeh_entries) is non-zero when depth is \u003E 0.  And this will lead to problems because the EXT_FIRST_INDEX() and EXT_LAST_INDEX() will return garbage and result in this:  [  135.245946] ------------[ cut here ]------------ [  135.247579] kernel BUG at fs/ext4/extents.c:2258! [  135.249045] invalid opcode: 0000 [#1] PREEMPT SMP [  135.250320] CPU: 2 PID: 238 Comm: tmp118 Not tainted 5.19.0-rc8\u002B #4 [  135.252067] Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b-rebuilt.opensuse.org 04/01/2014 [  135.255065] RIP: 0010:ext4_ext_map_blocks\u002B0xc20/0xcb0 [  135.256475] Code: [  135.261433] RSP: 0018:ffffc900005939f8 EFLAGS: 00010246 [  135.262847] RAX: 0000000000000024 RBX: ffffc90000593b70 RCX: 0000000000000023 [  135.264765] RDX: ffff8880038e5f10 RSI: 0000000000000003 RDI: ffff8880046e922c [  135.266670] RBP: ffff8880046e9348 R08: 0000000000000001 R09: ffff888002ca580c [  135.268576] R10: 0000000000002602 R11: 0000000000000000 R12: 0000000000000024 [  135.270477] R13: 0000000000000000 R14: 0000000000000024 R15: 0000000000000000 [  135.272394] FS:  00007fdabdc56740(0000) GS:ffff88807dd00000(0000) knlGS:0000000000000000 [  135.274510] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [  135.276075] CR2: 00007ffc26bd4f00 CR3: 0000000006261004 CR4: 0000000000170ea0 [  135.277952] Call Trace: [  135.278635]  \u003CTASK\u003E [  135.279247]  ? preempt_count_add\u002B0x6d/0xa0 [  135.280358]  ? percpu_counter_add_batch\u002B0x55/0xb0 [  135.281612]  ? _raw_read_unlock\u002B0x18/0x30 [  135.282704]  ext4_map_blocks\u002B0x294/0x5a0 [  135.283745]  ? xa_load\u002B0x6f/0xa0 [  135.284562]  ext4_mpage_readpages\u002B0x3d6/0x770 [  135.285646]  read_pages\u002B0x67/0x1d0 [  135.286492]  ? folio_add_lru\u002B0x51/0x80 [  135.287441]  page_cache_ra_unbounded\u002B0x124/0x170 [  135.288510]  filemap_get_pages\u002B0x23d/0x5a0 [  135.289457]  ? path_openat\u002B0xa72/0xdd0 [  135.290332]  filemap_read\u002B0xbf/0x300 [  135.291158]  ? _raw_spin_lock_irqsave\u002B0x17/0x40 [  135.292192]  new_sync_read\u002B0x103/0x170 [  135.293014]  vfs_read\u002B0x15d/0x180 [  135.293745]  ksys_read\u002B0xa1/0xe0 [  135.294461]  do_syscall_64\u002B0x3c/0x80 [  135.295284]  entry_SYSCALL_64_after_hwframe\u002B0x46/0xb0  This patch simply adds an extra check in __ext4_ext_check(), verifying that eh_entries is not 0 when eh_depth is \u003E 0.",
  "published": "2024-04-28T13:15:06Z",
  "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": 0.00235,
  "epssPercentile": 0.14576,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.0.2-1",
      "fix": "DEBIAN-CVE-2022-48631",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48631",
      "released": "2024-04-28T13:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.0.2-1",
      "fix": "DEBIAN-CVE-2022-48631",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48631",
      "released": "2024-04-28T13:15:06Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.0.2-1",
      "fix": "DEBIAN-CVE-2022-48631",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48631",
      "released": "2024-04-28T13:15:06Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}