CVE-2022-50009 (GCVE-0-2022-50009)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:01 – Updated: 2026-08-15 12:23
VLAI
Title
f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data There is issue as follows when test f2fs atomic write: F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop0): invalid crc_offset: 0 F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix. F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. ================================================================== BUG: KASAN: null-ptr-deref in f2fs_get_dnode_of_data+0xac/0x16d0 Read of size 8 at addr 0000000000000028 by task rep/1990 CPU: 4 PID: 1990 Comm: rep Not tainted 5.19.0-rc6-next-20220715 #266 Call Trace: <TASK> dump_stack_lvl+0x6e/0x91 print_report.cold+0x49a/0x6bb kasan_report+0xa8/0x130 f2fs_get_dnode_of_data+0xac/0x16d0 f2fs_do_write_data_page+0x2a5/0x1030 move_data_page+0x3c5/0xdf0 do_garbage_collect+0x2015/0x36c0 f2fs_gc+0x554/0x1d30 f2fs_balance_fs+0x7f5/0xda0 f2fs_write_single_data_page+0xb66/0xdc0 f2fs_write_cache_pages+0x716/0x1420 f2fs_write_data_pages+0x84f/0x9a0 do_writepages+0x130/0x3a0 filemap_fdatawrite_wbc+0x87/0xa0 file_write_and_wait_range+0x157/0x1c0 f2fs_do_sync_file+0x206/0x12d0 f2fs_sync_file+0x99/0xc0 vfs_fsync_range+0x75/0x140 f2fs_file_write_iter+0xd7b/0x1850 vfs_write+0x645/0x780 ksys_write+0xf1/0x1e0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd As 3db1de0e582c commit changed atomic write way which new a cow_inode for atomic write file, and also mark cow_inode as FI_ATOMIC_FILE. When f2fs_do_write_data_page write cow_inode will use cow_inode's cow_inode which is NULL. Then will trigger null-ptr-deref. To solve above issue, introduce FI_COW_FILE flag for COW inode. Fiexes: 3db1de0e582c("f2fs: change the current atomic write way")
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: 6db52f1944417c2601182a591a704e2f119c5215 , < 0f63e33eca6fa29a11c76fa31db5fe1cada5ad6e (git)
Affected: 3db1de0e582c358dd013f3703cd55b5fe4076436 , < 7000ad53ec1b17bd2fac76984b7b0c663755cbb7 (git)
Affected: 3db1de0e582c358dd013f3703cd55b5fe4076436 , < 4a2c5b7994960fac29cf8a3f4e62855bae1b27d4 (git)
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Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (semver)
Unaffected: 5.19.4 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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        "descriptions": [
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix null-ptr-deref in f2fs_get_dnode_of_data\n\nThere is issue as follows when test f2fs atomic write:\nF2FS-fs (loop0): Can\u0027t find valid F2FS filesystem in 2th superblock\nF2FS-fs (loop0): invalid crc_offset: 0\nF2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=1, run fsck to fix.\nF2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.\n==================================================================\nBUG: KASAN: null-ptr-deref in f2fs_get_dnode_of_data+0xac/0x16d0\nRead of size 8 at addr 0000000000000028 by task rep/1990\n\nCPU: 4 PID: 1990 Comm: rep Not tainted 5.19.0-rc6-next-20220715 #266\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x6e/0x91\n print_report.cold+0x49a/0x6bb\n kasan_report+0xa8/0x130\n f2fs_get_dnode_of_data+0xac/0x16d0\n f2fs_do_write_data_page+0x2a5/0x1030\n move_data_page+0x3c5/0xdf0\n do_garbage_collect+0x2015/0x36c0\n f2fs_gc+0x554/0x1d30\n f2fs_balance_fs+0x7f5/0xda0\n f2fs_write_single_data_page+0xb66/0xdc0\n f2fs_write_cache_pages+0x716/0x1420\n f2fs_write_data_pages+0x84f/0x9a0\n do_writepages+0x130/0x3a0\n filemap_fdatawrite_wbc+0x87/0xa0\n file_write_and_wait_range+0x157/0x1c0\n f2fs_do_sync_file+0x206/0x12d0\n f2fs_sync_file+0x99/0xc0\n vfs_fsync_range+0x75/0x140\n f2fs_file_write_iter+0xd7b/0x1850\n vfs_write+0x645/0x780\n ksys_write+0xf1/0x1e0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nAs 3db1de0e582c commit changed atomic write way which new a cow_inode for\natomic write file, and also mark cow_inode as FI_ATOMIC_FILE.\nWhen f2fs_do_write_data_page write cow_inode will use cow_inode\u0027s cow_inode\nwhich is NULL. Then will trigger null-ptr-deref.\nTo solve above issue, introduce FI_COW_FILE flag for COW inode.\n\nFiexes: 3db1de0e582c(\"f2fs: change the current atomic write way\")"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: corrige null-ptr-deref en f2fs_get_dnode_of_data Hay un problema como el siguiente cuando se prueba la escritura at\u00f3mica de f2fs: F2FS-fs (loop0): No se puede encontrar un sistema de archivos F2FS v\u00e1lido en el 2.\u00ba superbloque F2FS-fs (loop0): crc_offset no v\u00e1lido: 0 F2FS-fs (loop0): f2fs_check_nid_range: nid fuera de rango = 1, ejecute fsck para corregirlo. F2FS-fs (loop0): f2fs_check_nid_range: nid fuera de rango = 2, ejecute fsck para corregirlo. ======================================================================= ERROR: KASAN: null-ptr-deref en f2fs_get_dnode_of_data+0xac/0x16d0 Lectura de tama\u00f1o 8 en la direcci\u00f3n 000000000000028 por la tarea rep/1990 CPU: 4 PID: 1990 Comm: rep No contaminado 5.19.0-rc6-next-20220715 #266 Rastreo de llamadas:  dump_stack_lvl+0x6e/0x91 print_report.cold+0x49a/0x6bb kasan_report+0xa8/0x130 f2fs_get_dnode_of_data+0xac/0x16d0 f2fs_do_write_data_page+0x2a5/0x1030 move_data_page+0x3c5/0xdf0 do_garbage_collect+0x2015/0x36c0 f2fs_gc+0x554/0x1d30 f2fs_balance_fs+0x7f5/0xda0 f2fs_write_single_data_page+0xb66/0xdc0 f2fs_write_cache_pages+0x716/0x1420 f2fs_write_data_pages+0x84f/0x9a0 do_writepages+0x130/0x3a0 filemap_fdatawrite_wbc+0x87/0xa0 file_write_and_wait_range+0x157/0x1c0 f2fs_do_sync_file+0x206/0x12d0 f2fs_sync_file+0x99/0xc0 vfs_fsync_range+0x75/0x140 f2fs_file_write_iter+0xd7b/0x1850 vfs_write+0x645/0x780 ksys_write+0xf1/0x1e0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Como el commit 3db1de0e582c cambi\u00f3 la forma de escritura at\u00f3mica que ahora es un cow_inode para el archivo de escritura at\u00f3mica, y tambi\u00e9n marca cow_inode como FI_ATOMIC_FILE. Al escribir en f2fs_do_write_data_page, cow_inode usar\u00e1 el valor nulo de cow_inode. Esto activar\u00e1 null-ptr-deref. Para solucionar el problema, introduzca el indicador FI_COW_FILE para el inodo COW. Fiexes: 3db1de0e582c(\"f2fs: cambiar la ruta de escritura at\u00f3mica actual\")"
          }
        ],
        "id": "CVE-2022-50009",
        "lastModified": "2026-08-15T13:17:29.753",
        "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"
            }
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        "published": "2025-06-18T11:15:28.857",
        "references": [
          {
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            "tags": [
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        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:19:38+00:00",
      "cve": "CVE-2022-50009",
      "id": "CVE-2022-50009",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix null-ptr-deref in f2fs_get_dnode_of_data",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50009.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T01:27:12Z",
      "cve": "CVE-2022-50009",
      "id": "CVE-2022-50009",
      "initial_release_date": "2025-06-19T03:44:09Z",
      "product_status:known_not_affected": "509",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50009",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50009.json",
      "version": "11"
    }
  }
}



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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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.