CVE-2026-53039 (GCVE-0-2026-53039)
Vulnerability from cvelistv5
Published
2026-06-24 16:29
Modified
2026-06-24 16:29
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ocfs2: validate group add input before caching [BUG] OCFS2_IOC_GROUP_ADD can trigger a BUG_ON in ocfs2_set_new_buffer_uptodate(): kernel BUG at fs/ocfs2/uptodate.c:509! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:ocfs2_set_new_buffer_uptodate+0x194/0x1e0 fs/ocfs2/uptodate.c:509 Code: ffffe88f 42b9fe4c 89e64889 dfe8b4df Call Trace: ocfs2_group_add+0x3f1/0x1510 fs/ocfs2/resize.c:507 ocfs2_ioctl+0x309/0x6e0 fs/ocfs2/ioctl.c:887 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x197/0x1e0 fs/ioctl.c:583 x64_sys_call+0x1144/0x26a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x93/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7bbfb55a966d [CAUSE] ocfs2_group_add() calls ocfs2_set_new_buffer_uptodate() on a user-controlled group block before ocfs2_verify_group_and_input() validates that block number. That helper is only valid for newly allocated metadata and asserts that the block is not already present in the chosen metadata cache. The code also uses INODE_CACHE(inode) even though the group descriptor belongs to main_bm_inode and later journal accesses use that cache context instead. [FIX] Validate the on-disk group descriptor before caching it, then add it to the metadata cache tracked by INODE_CACHE(main_bm_inode). Keep the validation failure path separate from the later cleanup path so we only remove the buffer from that cache after it has actually been inserted. This keeps the group buffer lifetime consistent across validation, journaling, and cleanup.
References
Impacted products
Vendor Product Version
Linux Linux Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
Version: 7909f2bf835376a20d6dbf853eb459a27566eba2
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "fs/ocfs2/resize.c"
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              "version": "6.1.175",
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              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
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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\nocfs2: validate group add input before caching\n\n[BUG]\nOCFS2_IOC_GROUP_ADD can trigger a BUG_ON in\nocfs2_set_new_buffer_uptodate():\n\nkernel BUG at fs/ocfs2/uptodate.c:509!\nOops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\nRIP: 0010:ocfs2_set_new_buffer_uptodate+0x194/0x1e0 fs/ocfs2/uptodate.c:509\nCode: ffffe88f 42b9fe4c 89e64889 dfe8b4df\nCall Trace:\n ocfs2_group_add+0x3f1/0x1510 fs/ocfs2/resize.c:507\n ocfs2_ioctl+0x309/0x6e0 fs/ocfs2/ioctl.c:887\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl fs/ioctl.c:583 [inline]\n __x64_sys_ioctl+0x197/0x1e0 fs/ioctl.c:583\n x64_sys_call+0x1144/0x26a0 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x93/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\nRIP: 0033:0x7bbfb55a966d\n\n[CAUSE]\nocfs2_group_add() calls ocfs2_set_new_buffer_uptodate() on a\nuser-controlled group block before ocfs2_verify_group_and_input()\nvalidates that block number. That helper is only valid for newly\nallocated metadata and asserts that the block is not already present in\nthe chosen metadata cache. The code also uses INODE_CACHE(inode) even\nthough the group descriptor belongs to main_bm_inode and later journal\naccesses use that cache context instead.\n\n[FIX]\nValidate the on-disk group descriptor before caching it, then add it to\nthe metadata cache tracked by INODE_CACHE(main_bm_inode). Keep the\nvalidation failure path separate from the later cleanup path so we only\nremove the buffer from that cache after it has actually been inserted.\nThis keeps the group buffer lifetime consistent across validation,\njournaling, and cleanup."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:29:45.853Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f7e139d7563f6947ad509fb468903941d0bb7ddd"
        },
        {
          "url": "https://git.kernel.org/stable/c/22544ddedf381ed5191cfc783aea8d6c936bc201"
        },
        {
          "url": "https://git.kernel.org/stable/c/76bd722db0a92b84ccd99e03796a0b6f1ae71c31"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9ae3942deec4c9e3fa2070521f90910f7490011"
        },
        {
          "url": "https://git.kernel.org/stable/c/e7c2cb552e6eb85c0f5aefdd7f0f7c3c8591a6a3"
        },
        {
          "url": "https://git.kernel.org/stable/c/aed87e866d1a321edb9703563c2faa8fec89835d"
        },
        {
          "url": "https://git.kernel.org/stable/c/6c5e70409c1961fe1278968f038eaaed6cc1145a"
        },
        {
          "url": "https://git.kernel.org/stable/c/70b672833f4025341c11b22c7f83778a5cd611bc"
        }
      ],
      "title": "ocfs2: validate group add input before caching",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53039",
    "datePublished": "2026-06-24T16:29:45.853Z",
    "dateReserved": "2026-06-09T07:44:35.380Z",
    "dateUpdated": "2026-06-24T16:29:45.853Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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