CVE-2022-49170 (GCVE-0-2022-49170)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2025-07-11 17:19
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on curseg->alloc_type As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215657 - Overview UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 when mount and operate a corrupted image - Reproduce tested on kernel 5.17-rc4, 5.17-rc6 1. mkdir test_crash 2. cd test_crash 3. unzip tmp2.zip 4. mkdir mnt 5. ./single_test.sh f2fs 2 - Kernel dump [ 46.434454] loop0: detected capacity change from 0 to 131072 [ 46.529839] F2FS-fs (loop0): Mounted with checkpoint version = 7548c2d9 [ 46.738319] ================================================================================ [ 46.738412] UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 [ 46.738475] index 231 is out of range for type 'unsigned int [2]' [ 46.738539] CPU: 2 PID: 939 Comm: umount Not tainted 5.17.0-rc6 #1 [ 46.738547] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014 [ 46.738551] Call Trace: [ 46.738556] <TASK> [ 46.738563] dump_stack_lvl+0x47/0x5c [ 46.738581] ubsan_epilogue+0x5/0x50 [ 46.738592] __ubsan_handle_out_of_bounds+0x68/0x80 [ 46.738604] f2fs_allocate_data_block+0xdff/0xe60 [f2fs] [ 46.738819] do_write_page+0xef/0x210 [f2fs] [ 46.738934] f2fs_do_write_node_page+0x3f/0x80 [f2fs] [ 46.739038] __write_node_page+0x2b7/0x920 [f2fs] [ 46.739162] f2fs_sync_node_pages+0x943/0xb00 [f2fs] [ 46.739293] f2fs_write_checkpoint+0x7bb/0x1030 [f2fs] [ 46.739405] kill_f2fs_super+0x125/0x150 [f2fs] [ 46.739507] deactivate_locked_super+0x60/0xc0 [ 46.739517] deactivate_super+0x70/0xb0 [ 46.739524] cleanup_mnt+0x11a/0x200 [ 46.739532] __cleanup_mnt+0x16/0x20 [ 46.739538] task_work_run+0x67/0xa0 [ 46.739547] exit_to_user_mode_prepare+0x18c/0x1a0 [ 46.739559] syscall_exit_to_user_mode+0x26/0x40 [ 46.739568] do_syscall_64+0x46/0xb0 [ 46.739584] entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is we missed to do sanity check on curseg->alloc_type, result in out-of-bound accessing on sbi->block_count[] array, fix it.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 498b7088db71f9707359448cd6800bbb1882f4c3 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < f68caedf264a95c0b02dfd0d9f92ac2637d5848a (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 0748a0f7dcb9d9dddc80302d73ebcecef6782ef0 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < c12765e3f129b144421c80d3383df885f85ee290 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < f41ee8b91c00770d718be2ff4852a80017ae9ab3 (git)
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    Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.10.110 , ≤ 5.10.* (semver)
Unaffected: 5.15.33 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/segment.c"
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      "cpeApplicability": [
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              "cpeMatch": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on curseg-\u003ealloc_type\n\nAs Wenqing Liu reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215657\n\n- Overview\nUBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 when mount and operate a corrupted image\n\n- Reproduce\ntested on kernel 5.17-rc4, 5.17-rc6\n\n1. mkdir test_crash\n2. cd test_crash\n3. unzip tmp2.zip\n4. mkdir mnt\n5. ./single_test.sh f2fs 2\n\n- Kernel dump\n[   46.434454] loop0: detected capacity change from 0 to 131072\n[   46.529839] F2FS-fs (loop0): Mounted with checkpoint version = 7548c2d9\n[   46.738319] ================================================================================\n[   46.738412] UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2\n[   46.738475] index 231 is out of range for type \u0027unsigned int [2]\u0027\n[   46.738539] CPU: 2 PID: 939 Comm: umount Not tainted 5.17.0-rc6 #1\n[   46.738547] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n[   46.738551] Call Trace:\n[   46.738556]  \u003cTASK\u003e\n[   46.738563]  dump_stack_lvl+0x47/0x5c\n[   46.738581]  ubsan_epilogue+0x5/0x50\n[   46.738592]  __ubsan_handle_out_of_bounds+0x68/0x80\n[   46.738604]  f2fs_allocate_data_block+0xdff/0xe60 [f2fs]\n[   46.738819]  do_write_page+0xef/0x210 [f2fs]\n[   46.738934]  f2fs_do_write_node_page+0x3f/0x80 [f2fs]\n[   46.739038]  __write_node_page+0x2b7/0x920 [f2fs]\n[   46.739162]  f2fs_sync_node_pages+0x943/0xb00 [f2fs]\n[   46.739293]  f2fs_write_checkpoint+0x7bb/0x1030 [f2fs]\n[   46.739405]  kill_f2fs_super+0x125/0x150 [f2fs]\n[   46.739507]  deactivate_locked_super+0x60/0xc0\n[   46.739517]  deactivate_super+0x70/0xb0\n[   46.739524]  cleanup_mnt+0x11a/0x200\n[   46.739532]  __cleanup_mnt+0x16/0x20\n[   46.739538]  task_work_run+0x67/0xa0\n[   46.739547]  exit_to_user_mode_prepare+0x18c/0x1a0\n[   46.739559]  syscall_exit_to_user_mode+0x26/0x40\n[   46.739568]  do_syscall_64+0x46/0xb0\n[   46.739584]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is we missed to do sanity check on curseg-\u003ealloc_type,\nresult in out-of-bound accessing on sbi-\u003eblock_count[] array, fix it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-11T17:19:10.037Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/498b7088db71f9707359448cd6800bbb1882f4c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/f68caedf264a95c0b02dfd0d9f92ac2637d5848a"
        },
        {
          "url": "https://git.kernel.org/stable/c/0748a0f7dcb9d9dddc80302d73ebcecef6782ef0"
        },
        {
          "url": "https://git.kernel.org/stable/c/c12765e3f129b144421c80d3383df885f85ee290"
        },
        {
          "url": "https://git.kernel.org/stable/c/f41ee8b91c00770d718be2ff4852a80017ae9ab3"
        }
      ],
      "title": "f2fs: fix to do sanity check on curseg-\u003ealloc_type",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49170",
    "datePublished": "2025-02-26T01:55:27.562Z",
    "dateReserved": "2025-02-26T01:49:39.279Z",
    "dateUpdated": "2025-07-11T17:19:10.037Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49170\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:00:54.110\",\"lastModified\":\"2025-09-23T13:38:25.463\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to do sanity check on curseg-\u003ealloc_type\\n\\nAs Wenqing Liu reported in bugzilla:\\n\\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215657\\n\\n- Overview\\nUBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2 when mount and operate a corrupted image\\n\\n- Reproduce\\ntested on kernel 5.17-rc4, 5.17-rc6\\n\\n1. mkdir test_crash\\n2. cd test_crash\\n3. unzip tmp2.zip\\n4. mkdir mnt\\n5. ./single_test.sh f2fs 2\\n\\n- Kernel dump\\n[   46.434454] loop0: detected capacity change from 0 to 131072\\n[   46.529839] F2FS-fs (loop0): Mounted with checkpoint version = 7548c2d9\\n[   46.738319] ================================================================================\\n[   46.738412] UBSAN: array-index-out-of-bounds in fs/f2fs/segment.c:3460:2\\n[   46.738475] index 231 is out of range for type \u0027unsigned int [2]\u0027\\n[   46.738539] CPU: 2 PID: 939 Comm: umount Not tainted 5.17.0-rc6 #1\\n[   46.738547] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 04/01/2014\\n[   46.738551] Call Trace:\\n[   46.738556]  \u003cTASK\u003e\\n[   46.738563]  dump_stack_lvl+0x47/0x5c\\n[   46.738581]  ubsan_epilogue+0x5/0x50\\n[   46.738592]  __ubsan_handle_out_of_bounds+0x68/0x80\\n[   46.738604]  f2fs_allocate_data_block+0xdff/0xe60 [f2fs]\\n[   46.738819]  do_write_page+0xef/0x210 [f2fs]\\n[   46.738934]  f2fs_do_write_node_page+0x3f/0x80 [f2fs]\\n[   46.739038]  __write_node_page+0x2b7/0x920 [f2fs]\\n[   46.739162]  f2fs_sync_node_pages+0x943/0xb00 [f2fs]\\n[   46.739293]  f2fs_write_checkpoint+0x7bb/0x1030 [f2fs]\\n[   46.739405]  kill_f2fs_super+0x125/0x150 [f2fs]\\n[   46.739507]  deactivate_locked_super+0x60/0xc0\\n[   46.739517]  deactivate_super+0x70/0xb0\\n[   46.739524]  cleanup_mnt+0x11a/0x200\\n[   46.739532]  __cleanup_mnt+0x16/0x20\\n[   46.739538]  task_work_run+0x67/0xa0\\n[   46.739547]  exit_to_user_mode_prepare+0x18c/0x1a0\\n[   46.739559]  syscall_exit_to_user_mode+0x26/0x40\\n[   46.739568]  do_syscall_64+0x46/0xb0\\n[   46.739584]  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\nThe root cause is we missed to do sanity check on curseg-\u003ealloc_type,\\nresult in out-of-bound accessing on sbi-\u003eblock_count[] array, fix it.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una comprobaci\u00f3n de cordura en curseg-\u0026gt;alloc_type Como inform\u00f3 Wenqing Liu en bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215657 - Descripci\u00f3n general UBSAN: array-index-out-of-bounds en fs/f2fs/segment.c:3460:2 cuando se monta y opera una imagen da\u00f1ada - Reproducir probado en kernel 5.17-rc4, 5.17-rc6 1. mkdir test_crash 2. cd test_crash 3. unzip tmp2.zip 4. mkdir mnt 5. ./single_test.sh f2fs 2 - Volcado de kernel [ 46.434454] loop0: se detect\u00f3 un cambio de capacidad de 0 a 131072 [ 46.529839] F2FS-fs (loop0): montado con la versi\u00f3n de punto de control = 7548c2d9 [ 46.738319] ===================================================================================== [ 46.738412] UBSAN: \u00edndice de matriz fuera de los l\u00edmites en fs/f2fs/segment.c:3460:2 [ 46.738475] el \u00edndice 231 est\u00e1 fuera de rango para el tipo \u0027unsigned int [2]\u0027 [ 46.738539] CPU: 2 PID: 939 Comm: umount No contaminado 5.17.0-rc6 #1 [ [46.738547] Nombre del hardware: PC est\u00e1ndar QEMU (Q35 + ICH9, 2009), BIOS 1.13.0-1ubuntu1.1 01/04/2014 [ 46.738551] Seguimiento de llamadas: [ 46.738556]  [ 46.738563] dump_stack_lvl+0x47/0x5c [ 46.738581] ubsan_epilogue+0x5/0x50 [ 46.738592] __ubsan_handle_out_of_bounds+0x68/0x80 [ 46.738604] f2fs_allocate_data_block+0xdff/0xe60 [f2fs] [ 46.738819] do_write_page+0xef/0x210 [f2fs] [ 46.738934] f2fs_do_write_node_page+0x3f/0x80 [f2fs] [ 46.739038] __write_node_page+0x2b7/0x920 [f2fs] [ 46.739162] f2fs_sync_node_pages+0x943/0xb00 [f2fs] [ 46.739293] f2fs_write_checkpoint+0x7bb/0x1030 [f2fs] [ 46.739405] kill_f2fs_super+0x125/0x150 [f2fs] [ 46.739507] deactivate_locked_super+0x60/0xc0 [ 46.739517] deactivate_super+0x70/0xb0 [ 46.739524] cleanup_mnt+0x11a/0x200 [ 46.739532] __cleanup_mnt+0x16/0x20 [ 46.739538] task_work_run+0x67/0xa0 [ 46.739547] exit_to_user_mode_prepare+0x18c/0x1a0 [ 46.739559] syscall_exit_to_user_mode+0x26/0x40 [ 46.739568] do_syscall_64+0x46/0xb0 [ 46.739584] entry_SYSCALL_64_after_hwframe+0x44/0xae La causa ra\u00edz es que olvidamos realizar una verificaci\u00f3n de integridad en curseg-\u0026gt;alloc_type, lo que da como resultado un acceso fuera de los l\u00edmites en la matriz sbi-\u0026gt;block_count[], corr\u00edjalo.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-129\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.8\",\"versionEndExcluding\":\"5.10.110\",\"matchCriteriaId\":\"25732027-6262-4C2F-8172-ACB077C6A9A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.33\",\"matchCriteriaId\":\"27C42AE8-B387-43E2-938A-E1C8B40BE6D5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.16.19\",\"matchCriteriaId\":\"20C43679-0439-405A-B97F-685BEE50613B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.2\",\"matchCriteriaId\":\"210C679C-CF84-44A3-8939-E629C87E54BF\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0748a0f7dcb9d9dddc80302d73ebcecef6782ef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/498b7088db71f9707359448cd6800bbb1882f4c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c12765e3f129b144421c80d3383df885f85ee290\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f41ee8b91c00770d718be2ff4852a80017ae9ab3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f68caedf264a95c0b02dfd0d9f92ac2637d5848a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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