CVE-2024-33847 (GCVE-0-2024-33847)

Vulnerability from cvelistv5 – Published: 2024-06-24 13:56 – Updated: 2026-08-04 09:22
VLAI
Title
f2fs: compress: don't allow unaligned truncation on released compress inode
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: don't allow unaligned truncation on released compress inode f2fs image may be corrupted after below testcase: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - mount /dev/vdb /mnt/f2fs - touch /mnt/f2fs/file - f2fs_io setflags compression /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks [FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5] [FSCK] other corrupted bugs [Fail] The reason is: partial truncation assume compressed inode has reserved blocks, after partial truncation, valid block count may change w/o .i_blocks and .total_valid_block_count update, result in corruption. This patch only allow cluster size aligned truncation on released compress inode for fixing.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8e1651cd667cd6779db28314844d88b6de8312a3 , < b8962cf98595d1ec62f40f23667de830567ec8bc (git)
Affected: c61404153eb683da9c35aad133131554861ed561 , < 8acae047215024d1ac499b3c8337ef1b952f160b (git)
Affected: c61404153eb683da9c35aad133131554861ed561 , < 3ccf5210dc941a7aa0180596ac021568be4d35ec (git)
Affected: c61404153eb683da9c35aad133131554861ed561 , < 9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d (git)
Affected: c61404153eb683da9c35aad133131554861ed561 , < 5268241b41b1c5d0acca75e9b97d4fd719251c8c (git)
Affected: c61404153eb683da9c35aad133131554861ed561 , < 29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee (git)
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Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
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Show details on NVD website
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La imagen f2fs puede estar da\u00f1ada despu\u00e9s del siguiente caso de prueba: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - montar /dev/vdb /mnt/f2fs - tocar /mnt/f2fs/file - f2fs_io setflags compresi\u00f3n /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --\u0026gt; ino: 0x5 tiene i_blocks : 0x00000002, pero tiene bloques 0x3 [FSCK] valid_block_count que coincide con CP [Falla] [0x4, 0x5] [FSCK] otros errores corruptos [Falla] La raz\u00f3n es: truncamiento parcial se supone que el inodo comprimido tiene bloques reservados, despu\u00e9s del truncamiento parcial, bloque v\u00e1lido El recuento puede cambiar sin la actualizaci\u00f3n de .i_blocks y .total_valid_block_count, lo que provoca corrupci\u00f3n. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:07:53+00:00",
      "cve": "CVE-2024-33847",
      "id": "CVE-2024-33847",
      "initial_release_date": "2024-06-24T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: compress: don\u0026#39;t allow unaligned truncation on released compress inode",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-33847.json",
      "version": "3"
    },
    "vulnrichment": {
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\"https://git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: compress: don\u0027t allow unaligned truncation on released compress inode\\n\\nf2fs image may be corrupted after below testcase:\\n- mkfs.f2fs -O extra_attr,compression -f /dev/vdb\\n- mount /dev/vdb /mnt/f2fs\\n- touch /mnt/f2fs/file\\n- f2fs_io setflags compression /mnt/f2fs/file\\n- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4\\n- f2fs_io release_cblocks /mnt/f2fs/file\\n- truncate -s 8192 /mnt/f2fs/file\\n- umount /mnt/f2fs\\n- fsck.f2fs /dev/vdb\\n\\n[ASSERT] (fsck_chk_inode_blk:1256)  --\u003e ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks\\n[FSCK] valid_block_count matching with CP             [Fail] [0x4, 0x5]\\n[FSCK] other corrupted bugs                           [Fail]\\n\\nThe reason is: partial truncation assume compressed inode has reserved\\nblocks, after partial truncation, valid block count may change w/o\\n.i_blocks and .total_valid_block_count update, result in corruption.\\n\\nThis patch only allow cluster size aligned truncation on released\\ncompress inode for fixing.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.161\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.93\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.33\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.4\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.14\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-04T09:22:47.348Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-33847\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-04T09:22:47.348Z\", \"dateReserved\": \"2024-06-24T13:54:11.027Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-24T13:56:48.723Z\", \"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

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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.