CVE-2025-38221

{
  "id": "CVE-2025-38221",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "33f61ecabb10098b63dad3b729552779379f900d",
              "lessThan": "a4d60ba277ecd8a98c5a593cbc0ef2237c20a541",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "982bf37da09d078570650b691d9084f43805a5de",
              "lessThan": "28b62cb58fd014338f5004170f2e3a35bf0af238",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "982bf37da09d078570650b691d9084f43805a5de",
              "lessThan": "b5e58bcd79625423487fa3ecba8e8411b5396327",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/ext4/inode.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.15.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.16",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/ext4/inode.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-07-04T14:15:30.723",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/28b62cb58fd014338f5004170f2e3a35bf0af238",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a4d60ba277ecd8a98c5a593cbc0ef2237c20a541",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b5e58bcd79625423487fa3ecba8e8411b5396327",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix out of bounds punch offset\n\nPunching a hole with a start offset that exceeds max_end is not\npermitted and will result in a negative length in the\ntruncate_inode_partial_folio() function while truncating the page cache,\npotentially leading to undesirable consequences.\n\nA simple reproducer:\n\n  truncate -s 9895604649994 /mnt/foo\n  xfs_io -c \"pwrite 8796093022208 4096\" /mnt/foo\n  xfs_io -c \"fpunch 8796093022213 25769803777\" /mnt/foo\n\n  kernel BUG at include/linux/highmem.h:275!\n  Oops: invalid opcode: 0000 [#1] SMP PTI\n  CPU: 3 UID: 0 PID: 710 Comm: xfs_io Not tainted 6.15.0-rc3\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014\n  RIP: 0010:zero_user_segments.constprop.0+0xd7/0x110\n  RSP: 0018:ffffc90001cf3b38 EFLAGS: 00010287\n  RAX: 0000000000000005 RBX: ffffea0001485e40 RCX: 0000000000001000\n  RDX: 000000000040b000 RSI: 0000000000000005 RDI: 000000000040b000\n  RBP: 000000000040affb R08: ffff888000000000 R09: ffffea0000000000\n  R10: 0000000000000003 R11: 00000000fffc7fc5 R12: 0000000000000005\n  R13: 000000000040affb R14: ffffea0001485e40 R15: ffff888031cd3000\n  FS:  00007f4f63d0b780(0000) GS:ffff8880d337d000(0000)\n  knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 000000001ae0b038 CR3: 00000000536aa000 CR4: 00000000000006f0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   <TASK>\n   truncate_inode_partial_folio+0x3dd/0x620\n   truncate_inode_pages_range+0x226/0x720\n   ? bdev_getblk+0x52/0x3e0\n   ? ext4_get_group_desc+0x78/0x150\n   ? crc32c_arch+0xfd/0x180\n   ? __ext4_get_inode_loc+0x18c/0x840\n   ? ext4_inode_csum+0x117/0x160\n   ? jbd2_journal_dirty_metadata+0x61/0x390\n   ? __ext4_handle_dirty_metadata+0xa0/0x2b0\n   ? kmem_cache_free+0x90/0x5a0\n   ? jbd2_journal_stop+0x1d5/0x550\n   ? __ext4_journal_stop+0x49/0x100\n   truncate_pagecache_range+0x50/0x80\n   ext4_truncate_page_cache_block_range+0x57/0x3a0\n   ext4_punch_hole+0x1fe/0x670\n   ext4_fallocate+0x792/0x17d0\n   ? __count_memcg_events+0x175/0x2a0\n   vfs_fallocate+0x121/0x560\n   ksys_fallocate+0x51/0xc0\n   __x64_sys_fallocate+0x24/0x40\n   x64_sys_call+0x18d2/0x4170\n   do_syscall_64+0xa7/0x220\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix this by filtering out cases where the punching start offset exceeds\nmax_end."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: corrección de un desplazamiento de perforación fuera de los límites. Perforar un agujero con un desplazamiento inicial superior a max_end no está permitido y resultará en una longitud negativa en la función truncate_inode_partial_folio() al truncar la caché de página, lo que podría tener consecuencias indeseables. Un simple reproductor:  truncate -s 9895604649994 /mnt/foo xfs_io -c \"pwrite 8796093022208 4096\" /mnt/foo xfs_io -c \"fpunch 8796093022213 25769803777\" /mnt/foo kernel BUG at include/linux/highmem.h:275! Oops: invalid opcode: 0000 [#1] SMP PTI CPU: 3 UID: 0 PID: 710 Comm: xfs_io Not tainted 6.15.0-rc3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-2.fc40 04/01/2014 RIP: 0010:zero_user_segments.constprop.0+0xd7/0x110 RSP: 0018:ffffc90001cf3b38 EFLAGS: 00010287 RAX: 0000000000000005 RBX: ffffea0001485e40 RCX: 0000000000001000 RDX: 000000000040b000 RSI: 0000000000000005 RDI: 000000000040b000 RBP: 000000000040affb R08: ffff888000000000 R09: ffffea0000000000 R10: 0000000000000003 R11: 00000000fffc7fc5 R12: 0000000000000005 R13: 000000000040affb R14: ffffea0001485e40 R15: ffff888031cd3000 FS: 00007f4f63d0b780(0000) GS:ffff8880d337d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000001ae0b038 CR3: 00000000536aa000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Rastreo de llamadas:  truncate_inode_partial_folio+0x3dd/0x620 truncate_inode_pages_range+0x226/0x720 ? bdev_getblk+0x52/0x3e0 ? ext4_get_group_desc+0x78/0x150 ? crc32c_arch+0xfd/0x180 ? __ext4_get_inode_loc+0x18c/0x840 ? ext4_inode_csum+0x117/0x160 ? jbd2_journal_dirty_metadata+0x61/0x390 ? __ext4_handle_dirty_metadata+0xa0/0x2b0 ? kmem_cache_free+0x90/0x5a0 ? jbd2_journal_stop+0x1d5/0x550 ? __ext4_journal_stop+0x49/0x100 truncate_pagecache_range+0x50/0x80 ext4_truncate_page_cache_block_range+0x57/0x3a0 ext4_punch_hole+0x1fe/0x670 ext4_fallocate+0x792/0x17d0 ? __count_memcg_events+0x175/0x2a0 vfs_fallocate+0x121/0x560 ksys_fallocate+0x51/0xc0 __x64_sys_fallocate+0x24/0x40 x64_sys_call+0x18d2/0x4170 do_syscall_64+0xa7/0x220 entry_SYSCALL_64_after_hwframe+0x76/0x7e Solucione esto filtrando los casos en los que el desplazamiento de inicio de perforación exceda max_end."
    }
  ],
  "lastModified": "2026-06-17T09:16:25.047",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "39658889-E0DA-4E0A-92D1-0621707CF733",
              "versionEndExcluding": "6.15.4",
              "versionStartIncluding": "6.15"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}