CVE-2025-38222 (GCVE-0-2025-38222)

Vulnerability from cvelistv5 – Published: 2025-07-04 13:37 – Updated: 2025-11-03 17:35
VLAI?
Title
ext4: inline: fix len overflow in ext4_prepare_inline_data
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: inline: fix len overflow in ext4_prepare_inline_data When running the following code on an ext4 filesystem with inline_data feature enabled, it will lead to the bug below. fd = open("file1", O_RDWR | O_CREAT | O_TRUNC, 0666); ftruncate(fd, 30); pwrite(fd, "a", 1, (1UL << 40) + 5UL); That happens because write_begin will succeed as when ext4_generic_write_inline_data calls ext4_prepare_inline_data, pos + len will be truncated, leading to ext4_prepare_inline_data parameter to be 6 instead of 0x10000000006. Then, later when write_end is called, we hit: BUG_ON(pos + len > EXT4_I(inode)->i_inline_size); at ext4_write_inline_data. Fix it by using a loff_t type for the len parameter in ext4_prepare_inline_data instead of an unsigned int. [ 44.545164] ------------[ cut here ]------------ [ 44.545530] kernel BUG at fs/ext4/inline.c:240! [ 44.545834] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 44.546172] CPU: 3 UID: 0 PID: 343 Comm: test Not tainted 6.15.0-rc2-00003-g9080916f4863 #45 PREEMPT(full) 112853fcebfdb93254270a7959841d2c6aa2c8bb [ 44.546523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 44.546523] RIP: 0010:ext4_write_inline_data+0xfe/0x100 [ 44.546523] Code: 3c 0e 48 83 c7 48 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 e4 fa 43 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 0f 0b <0f> 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 49 [ 44.546523] RSP: 0018:ffffb342008b79a8 EFLAGS: 00010216 [ 44.546523] RAX: 0000000000000001 RBX: ffff9329c579c000 RCX: 0000010000000006 [ 44.546523] RDX: 000000000000003c RSI: ffffb342008b79f0 RDI: ffff9329c158e738 [ 44.546523] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000 [ 44.546523] R10: 00007ffffffff000 R11: ffffffff9bd0d910 R12: 0000006210000000 [ 44.546523] R13: fffffc7e4015e700 R14: 0000010000000005 R15: ffff9329c158e738 [ 44.546523] FS: 00007f4299934740(0000) GS:ffff932a60179000(0000) knlGS:0000000000000000 [ 44.546523] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.546523] CR2: 00007f4299a1ec90 CR3: 0000000002886002 CR4: 0000000000770eb0 [ 44.546523] PKRU: 55555554 [ 44.546523] Call Trace: [ 44.546523] <TASK> [ 44.546523] ext4_write_inline_data_end+0x126/0x2d0 [ 44.546523] generic_perform_write+0x17e/0x270 [ 44.546523] ext4_buffered_write_iter+0xc8/0x170 [ 44.546523] vfs_write+0x2be/0x3e0 [ 44.546523] __x64_sys_pwrite64+0x6d/0xc0 [ 44.546523] do_syscall_64+0x6a/0xf0 [ 44.546523] ? __wake_up+0x89/0xb0 [ 44.546523] ? xas_find+0x72/0x1c0 [ 44.546523] ? next_uptodate_folio+0x317/0x330 [ 44.546523] ? set_pte_range+0x1a6/0x270 [ 44.546523] ? filemap_map_pages+0x6ee/0x840 [ 44.546523] ? ext4_setattr+0x2fa/0x750 [ 44.546523] ? do_pte_missing+0x128/0xf70 [ 44.546523] ? security_inode_post_setattr+0x3e/0xd0 [ 44.546523] ? ___pte_offset_map+0x19/0x100 [ 44.546523] ? handle_mm_fault+0x721/0xa10 [ 44.546523] ? do_user_addr_fault+0x197/0x730 [ 44.546523] ? do_syscall_64+0x76/0xf0 [ 44.546523] ? arch_exit_to_user_mode_prepare+0x1e/0x60 [ 44.546523] ? irqentry_exit_to_user_mode+0x79/0x90 [ 44.546523] entry_SYSCALL_64_after_hwframe+0x55/0x5d [ 44.546523] RIP: 0033:0x7f42999c6687 [ 44.546523] Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 44.546523] RSP: 002b:00007ffeae4a7930 EFLAGS: 00000202 ORIG_RAX: 0000000000000012 [ 44.546523] RAX: ffffffffffffffda RBX: 00007f4299934740 RCX: 00007f42999c6687 [ 44.546523] RDX: 0000000000000001 RSI: 000055ea6149200f RDI: 0000000000000003 [ 44.546523] RBP: 00007ffeae4a79a0 R08: 0000000000000000 R09: 0000000000000000 [ 44.546523] R10: 0000010000000005 R11: 0000000000000202 R12: 0000 ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < d3dfc60efd145df5324b99a244b0b05505cde29b (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < 717414a8c083c376d4a8940a1230fe0c6ed4ee00 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < 9d1d1c5bf4fc1af76be154d3afb2acdbd89ec7d8 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < cf5f319a2d8ab8238f8cf3a19463b9bff6420934 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < 26e09d18599da0adc543eabd300080daaeda6869 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < 5766da2237e539f259aa0e5f3639ae37b44ca458 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < e80ee0263d88d77f2fd1927f915003a7066cbb50 (git)
Affected: f19d5870cbf72d4cb2a8e1f749dff97af99b071e , < 227cb4ca5a6502164f850d22aec3104d7888b270 (git)
Create a notification for this product.
    Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.95 , ≤ 6.6.* (semver)
Unaffected: 6.12.35 , ≤ 6.12.* (semver)
Unaffected: 6.15.4 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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          "dateUpdated": "2025-11-03T17:35:40.178Z",
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          "shortName": "CVE"
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        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
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        "title": "CVE Program Container"
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                  "versionEndExcluding": "6.16",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: inline: fix len overflow in ext4_prepare_inline_data\n\nWhen running the following code on an ext4 filesystem with inline_data\nfeature enabled, it will lead to the bug below.\n\n        fd = open(\"file1\", O_RDWR | O_CREAT | O_TRUNC, 0666);\n        ftruncate(fd, 30);\n        pwrite(fd, \"a\", 1, (1UL \u003c\u003c 40) + 5UL);\n\nThat happens because write_begin will succeed as when\next4_generic_write_inline_data calls ext4_prepare_inline_data, pos + len\nwill be truncated, leading to ext4_prepare_inline_data parameter to be 6\ninstead of 0x10000000006.\n\nThen, later when write_end is called, we hit:\n\n        BUG_ON(pos + len \u003e EXT4_I(inode)-\u003ei_inline_size);\n\nat ext4_write_inline_data.\n\nFix it by using a loff_t type for the len parameter in\next4_prepare_inline_data instead of an unsigned int.\n\n[   44.545164] ------------[ cut here ]------------\n[   44.545530] kernel BUG at fs/ext4/inline.c:240!\n[   44.545834] Oops: invalid opcode: 0000 [#1] SMP NOPTI\n[   44.546172] CPU: 3 UID: 0 PID: 343 Comm: test Not tainted 6.15.0-rc2-00003-g9080916f4863 #45 PREEMPT(full)  112853fcebfdb93254270a7959841d2c6aa2c8bb\n[   44.546523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   44.546523] RIP: 0010:ext4_write_inline_data+0xfe/0x100\n[   44.546523] Code: 3c 0e 48 83 c7 48 48 89 de 5b 41 5c 41 5d 41 5e 41 5f 5d e9 e4 fa 43 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 0f 0b \u003c0f\u003e 0b 0f 1f 44 00 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 49\n[   44.546523] RSP: 0018:ffffb342008b79a8 EFLAGS: 00010216\n[   44.546523] RAX: 0000000000000001 RBX: ffff9329c579c000 RCX: 0000010000000006\n[   44.546523] RDX: 000000000000003c RSI: ffffb342008b79f0 RDI: ffff9329c158e738\n[   44.546523] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000\n[   44.546523] R10: 00007ffffffff000 R11: ffffffff9bd0d910 R12: 0000006210000000\n[   44.546523] R13: fffffc7e4015e700 R14: 0000010000000005 R15: ffff9329c158e738\n[   44.546523] FS:  00007f4299934740(0000) GS:ffff932a60179000(0000) knlGS:0000000000000000\n[   44.546523] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[   44.546523] CR2: 00007f4299a1ec90 CR3: 0000000002886002 CR4: 0000000000770eb0\n[   44.546523] PKRU: 55555554\n[   44.546523] Call Trace:\n[   44.546523]  \u003cTASK\u003e\n[   44.546523]  ext4_write_inline_data_end+0x126/0x2d0\n[   44.546523]  generic_perform_write+0x17e/0x270\n[   44.546523]  ext4_buffered_write_iter+0xc8/0x170\n[   44.546523]  vfs_write+0x2be/0x3e0\n[   44.546523]  __x64_sys_pwrite64+0x6d/0xc0\n[   44.546523]  do_syscall_64+0x6a/0xf0\n[   44.546523]  ? __wake_up+0x89/0xb0\n[   44.546523]  ? xas_find+0x72/0x1c0\n[   44.546523]  ? next_uptodate_folio+0x317/0x330\n[   44.546523]  ? set_pte_range+0x1a6/0x270\n[   44.546523]  ? filemap_map_pages+0x6ee/0x840\n[   44.546523]  ? ext4_setattr+0x2fa/0x750\n[   44.546523]  ? do_pte_missing+0x128/0xf70\n[   44.546523]  ? security_inode_post_setattr+0x3e/0xd0\n[   44.546523]  ? ___pte_offset_map+0x19/0x100\n[   44.546523]  ? handle_mm_fault+0x721/0xa10\n[   44.546523]  ? do_user_addr_fault+0x197/0x730\n[   44.546523]  ? do_syscall_64+0x76/0xf0\n[   44.546523]  ? arch_exit_to_user_mode_prepare+0x1e/0x60\n[   44.546523]  ? irqentry_exit_to_user_mode+0x79/0x90\n[   44.546523]  entry_SYSCALL_64_after_hwframe+0x55/0x5d\n[   44.546523] RIP: 0033:0x7f42999c6687\n[   44.546523] Code: 48 89 fa 4c 89 df e8 58 b3 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 \u003c5b\u003e c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff\n[   44.546523] RSP: 002b:00007ffeae4a7930 EFLAGS: 00000202 ORIG_RAX: 0000000000000012\n[   44.546523] RAX: ffffffffffffffda RBX: 00007f4299934740 RCX: 00007f42999c6687\n[   44.546523] RDX: 0000000000000001 RSI: 000055ea6149200f RDI: 0000000000000003\n[   44.546523] RBP: 00007ffeae4a79a0 R08: 0000000000000000 R09: 0000000000000000\n[   44.546523] R10: 0000010000000005 R11: 0000000000000202 R12: 0000\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-28T04:15:34.040Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d3dfc60efd145df5324b99a244b0b05505cde29b"
        },
        {
          "url": "https://git.kernel.org/stable/c/717414a8c083c376d4a8940a1230fe0c6ed4ee00"
        },
        {
          "url": "https://git.kernel.org/stable/c/9d1d1c5bf4fc1af76be154d3afb2acdbd89ec7d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf5f319a2d8ab8238f8cf3a19463b9bff6420934"
        },
        {
          "url": "https://git.kernel.org/stable/c/26e09d18599da0adc543eabd300080daaeda6869"
        },
        {
          "url": "https://git.kernel.org/stable/c/5766da2237e539f259aa0e5f3639ae37b44ca458"
        },
        {
          "url": "https://git.kernel.org/stable/c/e80ee0263d88d77f2fd1927f915003a7066cbb50"
        },
        {
          "url": "https://git.kernel.org/stable/c/227cb4ca5a6502164f850d22aec3104d7888b270"
        }
      ],
      "title": "ext4: inline: fix len overflow in ext4_prepare_inline_data",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38222",
    "datePublished": "2025-07-04T13:37:37.879Z",
    "dateReserved": "2025-04-16T04:51:23.995Z",
    "dateUpdated": "2025-11-03T17:35:40.178Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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Sightings

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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.