CVE-2026-93140

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: udf: Mark LVID buffer as uptodate before marking it dirty When an I/O error occurs while writing the Logical Volume Integrity Descriptor (LVID) buffer to the block device, the block layer's completion handler (`end_buffer_write_sync()`) clears the `BH_Uptodate` flag on the buffer. However, the buffer still contains valid LVID data in memory. If the filesystem is subsequently remounted read-write or synced, `udf_open_lvid()` or `udf_sync_fs()` will modify the LVID buffer and call `mark_buffer_dirty()`. This triggers a spurious `WARN_ON_ONCE(!buffer_uptodate(bh))` warning in `mark_buffer_dirty()` because the buffer is not marked uptodate, even though its in-memory contents are valid and are about to be overwritten. To prevent this spurious warning, unconditionally set the `BH_Uptodate` flag before calling `mark_buffer_dirty()` in `udf_open_lvid()` and `udf_sync_fs()`. This acknowledges that the in-memory buffer is valid and matches the workaround previously applied to `udf_close_lvid()` in commit 853a0c25baf9 ("udf: Mark LVID buffer as uptodate before marking it dirty"). Extending this workaround ensures consistent behavior across all LVID updates. Buffer I/O error on dev loop0, logical block 128, lost sync page write ------------[ cut here ]------------ !buffer_uptodate(bh) WARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087 ... Call Trace: <TASK> udf_open_lvid+0x369/0x5b0 fs/udf/super.c:2078 udf_reconfigure+0x336/0x540 fs/udf/super.c:679 reconfigure_super+0x232/0x8f0 fs/super.c:1080 vfs_cmd_reconfigure fs/fsopen.c:268 [inline] vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:297 __do_sys_fsconfig fs/fsopen.c:463 [inline] __se_sys_fsconfig+0x6b9/0x810 fs/fsopen.c:350 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 </TASK>

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-17 17:18:08.973000

Last modified

2026-10-19 10:17:04.060000

View original CVE JSON

{
  "id": "CVE-2026-93140",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:18:08.973",
  "lastModified": "2026-10-19T10:17:04.060",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Mark LVID buffer as uptodate before marking it dirty\n\nWhen an I/O error occurs while writing the Logical Volume Integrity\nDescriptor (LVID) buffer to the block device, the block layer's completion\nhandler (`end_buffer_write_sync()`) clears the `BH_Uptodate` flag on the\nbuffer. However, the buffer still contains valid LVID data in memory. If\nthe filesystem is subsequently remounted read-write or synced,\n`udf_open_lvid()` or `udf_sync_fs()` will modify the LVID buffer and call\n`mark_buffer_dirty()`. This triggers a spurious\n`WARN_ON_ONCE(!buffer_uptodate(bh))` warning in `mark_buffer_dirty()`\nbecause the buffer is not marked uptodate, even though its in-memory\ncontents are valid and are about to be overwritten.\n\nTo prevent this spurious warning, unconditionally set the `BH_Uptodate`\nflag before calling `mark_buffer_dirty()` in `udf_open_lvid()` and\n`udf_sync_fs()`. This acknowledges that the in-memory buffer is valid and\nmatches the workaround previously applied to `udf_close_lvid()` in commit\n853a0c25baf9 (\"udf: Mark LVID buffer as uptodate before marking it dirty\").\nExtending this workaround ensures consistent behavior across all LVID\nupdates.\n\nBuffer I/O error on dev loop0, logical block 128, lost sync page write\n------------[ cut here ]------------\n!buffer_uptodate(bh)\nWARNING: fs/buffer.c:1087 at mark_buffer_dirty+0x299/0x410 fs/buffer.c:1087\n...\nCall Trace:\n <TASK>\n udf_open_lvid+0x369/0x5b0 fs/udf/super.c:2078\n udf_reconfigure+0x336/0x540 fs/udf/super.c:679\n reconfigure_super+0x232/0x8f0 fs/super.c:1080\n vfs_cmd_reconfigure fs/fsopen.c:268 [inline]\n vfs_fsconfig_locked+0x171/0x320 fs/fsopen.c:297\n __do_sys_fsconfig fs/fsopen.c:463 [inline]\n __se_sys_fsconfig+0x6b9/0x810 fs/fsopen.c:350\n do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94\n </TASK>"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/udf/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
              "lessThan": "e6461ef34f91ad7dbffdf912b3d661a7dd892931",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
              "lessThan": "359cea636f4a74a96c01a8050f155e12840c079a",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
              "lessThan": "a4c4e38b356ad4c1f90478124922917489137c08",
              "versionType": "git",
              "status": "affected"
            },
            {
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              "lessThan": "8034ddf4751d9143c5ef7eebe3d4f33218fdd378",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
              "lessThan": "ee477e5204f764444e60699280abf5936c2a6ae6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
              "lessThan": "11afe1912140f79d5af3091a54b181ef72fce1a5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "853a0c25baf96b028de1654bea1e0c8857eadf3d",
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              "versionType": "git",
              "status": "affected"
            },
            {
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              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "c7da4ed95a78e38fdaffb06eaf1a3f3318b1add6",
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            {
              "version": "c005218328597211008a4d33a91e2952798e3556",
              "versionType": "git",
              "status": "affected"
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            {
              "version": "1357ed0b4b9db30846377febb40a847d6103c991",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "43f4a516b2f5492bc597f3753b693ad8adc62748",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "2.6.27.62",
              "lessThan": "2.6.28",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.6.32.57",
              "lessThan": "2.6.33",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "3.0.21",
              "lessThan": "3.1",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "3.2.6",
              "lessThan": "3.3",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/udf/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "3.3",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "3.3",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.270",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.221",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.188",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.157",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.52",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.6",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/11afe1912140f79d5af3091a54b181ef72fce1a5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "url": "https://git.kernel.org/stable/c/8034ddf4751d9143c5ef7eebe3d4f33218fdd378",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "url": "https://git.kernel.org/stable/c/a4c4e38b356ad4c1f90478124922917489137c08",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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}