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CVE-2023-53270 (GCVE-0-2023-53270)

Vulnerability from cvelistv5 – Published: 2025-09-16 08:06 – Updated: 2026-05-11 19:41
VLAI
Title
ext4: fix i_disksize exceeding i_size problem in paritally written case
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: fix i_disksize exceeding i_size problem in paritally written case It is possible for i_disksize can exceed i_size, triggering a warning. generic_perform_write copied = iov_iter_copy_from_user_atomic(len) // copied < len ext4_da_write_end | ext4_update_i_disksize | new_i_size = pos + copied; | WRITE_ONCE(EXT4_I(inode)->i_disksize, newsize) // update i_disksize | generic_write_end | copied = block_write_end(copied, len) // copied = 0 | if (unlikely(copied < len)) | if (!PageUptodate(page)) | copied = 0; | if (pos + copied > inode->i_size) // return false if (unlikely(copied == 0)) goto again; if (unlikely(iov_iter_fault_in_readable(i, bytes))) { status = -EFAULT; break; } We get i_disksize greater than i_size here, which could trigger WARNING check 'i_size_read(inode) < EXT4_I(inode)->i_disksize' while doing dio: ext4_dio_write_iter iomap_dio_rw __iomap_dio_rw // return err, length is not aligned to 512 ext4_handle_inode_extension WARN_ON_ONCE(i_size_read(inode) < EXT4_I(inode)->i_disksize) // Oops WARNING: CPU: 2 PID: 2609 at fs/ext4/file.c:319 CPU: 2 PID: 2609 Comm: aa Not tainted 6.3.0-rc2 RIP: 0010:ext4_file_write_iter+0xbc7 Call Trace: vfs_write+0x3b1 ksys_write+0x77 do_syscall_64+0x39 Fix it by updating 'copied' value before updating i_disksize just like ext4_write_inline_data_end() does. A reproducer can be found in the buganizer link below.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:05 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 64769240bd07f446f83660bb143bb609d8ab4910 , < 18eb23891aeae3229baf8c7c23b76be3364e1967 (git)
Affected: 64769240bd07f446f83660bb143bb609d8ab4910 , < d30090eb546d993ea3f3023452540c476ea614a5 (git)
Affected: 64769240bd07f446f83660bb143bb609d8ab4910 , < 3ecea2fee14227712694c8b54ad99d471e61de92 (git)
Affected: 64769240bd07f446f83660bb143bb609d8ab4910 , < 53877ed201baa6b58f7ce9df92664a839113c30e (git)
Affected: 64769240bd07f446f83660bb143bb609d8ab4910 , < 1dedde690303c05ef732b7c5c8356fdf60a4ade3 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.27
Unaffected: 0 , < 2.6.27 (semver)
Unaffected: 5.15.111 , ≤ 5.15.* (semver)
Unaffected: 6.1.28 , ≤ 6.1.* (semver)
Unaffected: 6.2.15 , ≤ 6.2.* (semver)
Unaffected: 6.3.2 , ≤ 6.3.* (semver)
Unaffected: 6.4 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix i_disksize exceeding i_size problem in paritally written case\n\nIt is possible for i_disksize can exceed i_size, triggering a warning.\n\ngeneric_perform_write\n copied = iov_iter_copy_from_user_atomic(len) // copied \u003c len\n ext4_da_write_end\n | ext4_update_i_disksize\n |  new_i_size = pos + copied;\n |  WRITE_ONCE(EXT4_I(inode)-\u003ei_disksize, newsize) // update i_disksize\n | generic_write_end\n |  copied = block_write_end(copied, len) // copied = 0\n |   if (unlikely(copied \u003c len))\n |    if (!PageUptodate(page))\n |     copied = 0;\n |  if (pos + copied \u003e inode-\u003ei_size) // return false\n if (unlikely(copied == 0))\n  goto again;\n if (unlikely(iov_iter_fault_in_readable(i, bytes))) {\n  status = -EFAULT;\n  break;\n }\n\nWe get i_disksize greater than i_size here, which could trigger WARNING\ncheck \u0027i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize\u0027 while doing dio:\n\next4_dio_write_iter\n iomap_dio_rw\n  __iomap_dio_rw // return err, length is not aligned to 512\n ext4_handle_inode_extension\n  WARN_ON_ONCE(i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize) // Oops\n\n WARNING: CPU: 2 PID: 2609 at fs/ext4/file.c:319\n CPU: 2 PID: 2609 Comm: aa Not tainted 6.3.0-rc2\n RIP: 0010:ext4_file_write_iter+0xbc7\n Call Trace:\n  vfs_write+0x3b1\n  ksys_write+0x77\n  do_syscall_64+0x39\n\nFix it by updating \u0027copied\u0027 value before updating i_disksize just like\next4_write_inline_data_end() does.\n\nA reproducer can be found in the buganizer link below."
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false\\n if (unlikely(copied == 0))\\n  goto again;\\n if (unlikely(iov_iter_fault_in_readable(i, bytes))) {\\n  status = -EFAULT;\\n  break;\\n }\\n\\nWe get i_disksize greater than i_size here, which could trigger WARNING\\ncheck \u0027i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize\u0027 while doing dio:\\n\\next4_dio_write_iter\\n iomap_dio_rw\\n  __iomap_dio_rw // return err, length is not aligned to 512\\n ext4_handle_inode_extension\\n  WARN_ON_ONCE(i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize) // Oops\\n\\n WARNING: CPU: 2 PID: 2609 at fs/ext4/file.c:319\\n CPU: 2 PID: 2609 Comm: aa Not tainted 6.3.0-rc2\\n RIP: 0010:ext4_file_write_iter+0xbc7\\n Call Trace:\\n  vfs_write+0x3b1\\n  ksys_write+0x77\\n  do_syscall_64+0x39\\n\\nFix it by updating \u0027copied\u0027 value before updating i_disksize just like\\next4_write_inline_data_end() does.\\n\\nA reproducer can be found in the buganizer link 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    "redhat_vex": {
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      "title": "kernel: ext4: fix i_disksize exceeding i_size problem in paritally written case",
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      "version": "3"
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      "cve": "CVE-2023-53270",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53270",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53270.json",
      "version": "34"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53270\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:05:22.699836Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:05:18.579Z\"}}], \"cna\": {\"title\": \"ext4: fix i_disksize exceeding i_size problem in paritally written case\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"64769240bd07f446f83660bb143bb609d8ab4910\", \"lessThan\": \"18eb23891aeae3229baf8c7c23b76be3364e1967\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64769240bd07f446f83660bb143bb609d8ab4910\", \"lessThan\": \"d30090eb546d993ea3f3023452540c476ea614a5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64769240bd07f446f83660bb143bb609d8ab4910\", \"lessThan\": \"3ecea2fee14227712694c8b54ad99d471e61de92\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64769240bd07f446f83660bb143bb609d8ab4910\", \"lessThan\": \"53877ed201baa6b58f7ce9df92664a839113c30e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64769240bd07f446f83660bb143bb609d8ab4910\", \"lessThan\": \"1dedde690303c05ef732b7c5c8356fdf60a4ade3\", \"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\": \"2.6.27\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.27\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.111\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.28\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.2.*\"}, {\"status\": \"unaffected\", \"version\": \"6.3.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.3.*\"}, {\"status\": \"unaffected\", \"version\": \"6.4\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ext4/inode.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/18eb23891aeae3229baf8c7c23b76be3364e1967\"}, {\"url\": \"https://git.kernel.org/stable/c/d30090eb546d993ea3f3023452540c476ea614a5\"}, {\"url\": \"https://git.kernel.org/stable/c/3ecea2fee14227712694c8b54ad99d471e61de92\"}, {\"url\": \"https://git.kernel.org/stable/c/53877ed201baa6b58f7ce9df92664a839113c30e\"}, {\"url\": \"https://git.kernel.org/stable/c/1dedde690303c05ef732b7c5c8356fdf60a4ade3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix i_disksize exceeding i_size problem in paritally written case\\n\\nIt is possible for i_disksize can exceed i_size, triggering a warning.\\n\\ngeneric_perform_write\\n copied = iov_iter_copy_from_user_atomic(len) // copied \u003c len\\n ext4_da_write_end\\n | ext4_update_i_disksize\\n |  new_i_size = pos + copied;\\n |  WRITE_ONCE(EXT4_I(inode)-\u003ei_disksize, newsize) // update i_disksize\\n | generic_write_end\\n |  copied = block_write_end(copied, len) // copied = 0\\n |   if (unlikely(copied \u003c len))\\n |    if (!PageUptodate(page))\\n |     copied = 0;\\n |  if (pos + copied \u003e inode-\u003ei_size) // return false\\n if (unlikely(copied == 0))\\n  goto again;\\n if (unlikely(iov_iter_fault_in_readable(i, bytes))) {\\n  status = -EFAULT;\\n  break;\\n }\\n\\nWe get i_disksize greater than i_size here, which could trigger WARNING\\ncheck \u0027i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize\u0027 while doing dio:\\n\\next4_dio_write_iter\\n iomap_dio_rw\\n  __iomap_dio_rw // return err, length is not aligned to 512\\n ext4_handle_inode_extension\\n  WARN_ON_ONCE(i_size_read(inode) \u003c EXT4_I(inode)-\u003ei_disksize) // Oops\\n\\n WARNING: CPU: 2 PID: 2609 at fs/ext4/file.c:319\\n CPU: 2 PID: 2609 Comm: aa Not tainted 6.3.0-rc2\\n RIP: 0010:ext4_file_write_iter+0xbc7\\n Call Trace:\\n  vfs_write+0x3b1\\n  ksys_write+0x77\\n  do_syscall_64+0x39\\n\\nFix it by updating \u0027copied\u0027 value before updating i_disksize just like\\next4_write_inline_data_end() does.\\n\\nA reproducer can be found in the buganizer link below.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.111\", \"versionStartIncluding\": \"2.6.27\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.28\", \"versionStartIncluding\": \"2.6.27\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2.15\", \"versionStartIncluding\": \"2.6.27\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.3.2\", \"versionStartIncluding\": \"2.6.27\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4\", \"versionStartIncluding\": \"2.6.27\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:41:40.526Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53270\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:41:40.526Z\", \"dateReserved\": \"2025-09-16T08:05:12.516Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-16T08:06:59.730Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.