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CVE-2023-53101 (GCVE-0-2023-53101)

Vulnerability from cvelistv5 – Published: 2025-05-02 15:55 – Updated: 2026-05-11 19:38
VLAI
Title
ext4: zero i_disksize when initializing the bootloader inode
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: zero i_disksize when initializing the bootloader inode If the boot loader inode has never been used before, the EXT4_IOC_SWAP_BOOT inode will initialize it, including setting the i_size to 0. However, if the "never before used" boot loader has a non-zero i_size, then i_disksize will be non-zero, and the inconsistency between i_size and i_disksize can trigger a kernel warning: WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319 CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa RIP: 0010:ext4_file_write_iter+0xbc7/0xd10 Call Trace: vfs_write+0x3b1/0x5c0 ksys_write+0x77/0x160 __x64_sys_write+0x22/0x30 do_syscall_64+0x39/0x80 Reproducer: 1. create corrupted image and mount it: mke2fs -t ext4 /tmp/foo.img 200 debugfs -wR "sif <5> size 25700" /tmp/foo.img mount -t ext4 /tmp/foo.img /mnt cd /mnt echo 123 > file 2. Run the reproducer program: posix_memalign(&buf, 1024, 1024) fd = open("file", O_RDWR | O_DIRECT); ioctl(fd, EXT4_IOC_SWAP_BOOT); write(fd, buf, 1024); Fix this by setting i_disksize as well as i_size to zero when initiaizing the boot loader inode.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < d6c1447e483c05dbcfb3ff77ac04237a82070b8c (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 59eee0cdf8c036f554add97a4da7c06d7a9ff34a (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 0d8a6c9a6415999fee1259ccf1796480c026b7d6 (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 3f00c476da8fe7c4c34ea16abb55d74127120413 (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 01a821aacc64d4b05dafd239dbc9b7856686002f (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 9cb27b1e76f0cc886ac09055bc41c0ab3f205167 (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < 9e9a4cc5486356158554f6ad73027d8635a48b34 (git)
Affected: 393d1d1d76933886d5e1ce603214c9987589c6d5 , < f5361da1e60d54ec81346aee8e3d8baf1be0b762 (git)
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Linux Linux Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 4.14.310 , ≤ 4.14.* (semver)
Unaffected: 4.19.278 , ≤ 4.19.* (semver)
Unaffected: 5.4.237 , ≤ 5.4.* (semver)
Unaffected: 5.10.175 , ≤ 5.10.* (semver)
Unaffected: 5.15.103 , ≤ 5.15.* (semver)
Unaffected: 6.1.20 , ≤ 6.1.* (semver)
Unaffected: 6.2.7 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: zero i_disksize when initializing the bootloader inode\n\nIf the boot loader inode has never been used before, the\nEXT4_IOC_SWAP_BOOT inode will initialize it, including setting the\ni_size to 0.  However, if the \"never before used\" boot loader has a\nnon-zero i_size, then i_disksize will be non-zero, and the\ninconsistency between i_size and i_disksize can trigger a kernel\nwarning:\n\n WARNING: CPU: 0 PID: 2580 at fs/ext4/file.c:319\n CPU: 0 PID: 2580 Comm: bb Not tainted 6.3.0-rc1-00004-g703695902cfa\n RIP: 0010:ext4_file_write_iter+0xbc7/0xd10\n Call Trace:\n  vfs_write+0x3b1/0x5c0\n  ksys_write+0x77/0x160\n  __x64_sys_write+0x22/0x30\n  do_syscall_64+0x39/0x80\n\nReproducer:\n 1. create corrupted image and mount it:\n       mke2fs -t ext4 /tmp/foo.img 200\n       debugfs -wR \"sif \u003c5\u003e size 25700\" /tmp/foo.img\n       mount -t ext4 /tmp/foo.img /mnt\n       cd /mnt\n       echo 123 \u003e file\n 2. Run the reproducer program:\n       posix_memalign(\u0026buf, 1024, 1024)\n       fd = open(\"file\", O_RDWR | O_DIRECT);\n       ioctl(fd, EXT4_IOC_SWAP_BOOT);\n       write(fd, buf, 1024);\n\nFix this by setting i_disksize as well as i_size to zero when\ninitiaizing the boot loader inode."
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          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: i_disksize cero al inicializar el inodo del cargador de arranque. Si el inodo del cargador de arranque nunca se ha usado antes, el inodo EXT4_IOC_SWAP_BOOT lo inicializar\u00e1, incluyendo el establecimiento de i_size a 0. Sin embargo, si el cargador de arranque \"nunca usado antes\" tiene un i_size distinto de cero, entonces i_disksize ser\u00e1 distinto de cero, y la inconsistencia entre i_size e i_disksize puede activar una advertencia del kernel: ADVERTENCIA: CPU: 0 PID: 2580 en fs/ext4/file.c:319 CPU: 0 PID: 2580 Comm: bb No contaminado 6.3.0-rc1-00004-g703695902cfa RIP: 0010:ext4_file_write_iter+0xbc7/0xd10 Rastreo de llamadas: vfs_write+0x3b1/0x5c0 ksys_write+0x77/0x160 __x64_sys_write+0x22/0x30 do_syscall_64+0x39/0x80 Reproductor: 1. crear una imagen da\u00f1ada y montarla: mke2fs -t ext4 /tmp/foo.img 200 debugfs -wR \"sif \u0026lt;5\u0026gt; size 25700\" /tmp/foo.img mount -t ext4 /tmp/foo.img /mnt cd /mnt echo 123 \u0026gt; file 2. Ejecutar el programa reproductor: posix_memalign(\u0026amp;buf, 1024, 1024) fd = open(\"file\", O_RDWR | Solucione esto configurando i_disksize e i_size en cero al iniciar el inodo del cargador de arranque."
          }
        ],
        "id": "CVE-2023-53101",
        "lastModified": "2026-06-17T06:44:17.953",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-05-02T16:15:29.023",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/01a821aacc64d4b05dafd239dbc9b7856686002f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0d8a6c9a6415999fee1259ccf1796480c026b7d6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/3f00c476da8fe7c4c34ea16abb55d74127120413"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/59eee0cdf8c036f554add97a4da7c06d7a9ff34a"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9cb27b1e76f0cc886ac09055bc41c0ab3f205167"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9e9a4cc5486356158554f6ad73027d8635a48b34"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/d6c1447e483c05dbcfb3ff77ac04237a82070b8c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f5361da1e60d54ec81346aee8e3d8baf1be0b762"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T22:08:51+00:00",
      "cve": "CVE-2023-53101",
      "id": "CVE-2023-53101",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ext4: zero i_disksize when initializing the bootloader inode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53101.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T16:48:19Z",
      "cve": "CVE-2023-53101",
      "id": "CVE-2023-53101",
      "initial_release_date": "2025-05-03T02:50:41Z",
      "product_status:known_affected": "529",
      "product_status:known_not_affected": "155",
      "product_status:recommended": "251",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53101",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53101.json",
      "version": "41"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.