CVE-2022-50753 (GCVE-0-2022-50753)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2025-12-24 13:05
VLAI?
Title
f2fs: fix to do sanity check on summary info
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on summary info As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216456 BUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs] Read of size 4 at addr ffff8881464dcd80 by task mount/1013 CPU: 3 PID: 1013 Comm: mount Tainted: G W 6.0.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x45/0x5e print_report.cold+0xf3/0x68d kasan_report+0xa8/0x130 recover_data+0x63ae/0x6ae0 [f2fs] f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs] f2fs_fill_super+0x4665/0x61e0 [f2fs] mount_bdev+0x2cf/0x3b0 legacy_get_tree+0xed/0x1d0 vfs_get_tree+0x81/0x2b0 path_mount+0x47e/0x19d0 do_mount+0xce/0xf0 __x64_sys_mount+0x12c/0x1a0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node is larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size page. - recover_data - do_recover_data - check_index_in_prev_nodes - f2fs_data_blkaddr This patch adds sanity check on summary info in recovery and GC flow in where the flows rely on them. After patch: [ 29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c99860f9a75079f339ed7670425b1ac58f26e2ff (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 73687c53919f49dff3852155621dab7a35c52854 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e168f819bfa42459b14f479e55ebd550bcc78899 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0922ad64ccefa3e483e84355942b86e13c8fea68 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c6ad7fd16657ebd34a87a97d9588195aae87597d (git)
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    Linux Linux Unaffected: 5.4.220 , ≤ 5.4.* (semver)
Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "fs/f2fs/gc.c",
            "fs/f2fs/recovery.c"
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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 summary info\n\nAs Wenqing Liu reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=216456\n\nBUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs]\nRead of size 4 at addr ffff8881464dcd80 by task mount/1013\n\nCPU: 3 PID: 1013 Comm: mount Tainted: G        W          6.0.0-rc4 #1\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n dump_stack_lvl+0x45/0x5e\n print_report.cold+0xf3/0x68d\n kasan_report+0xa8/0x130\n recover_data+0x63ae/0x6ae0 [f2fs]\n f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs]\n f2fs_fill_super+0x4665/0x61e0 [f2fs]\n mount_bdev+0x2cf/0x3b0\n legacy_get_tree+0xed/0x1d0\n vfs_get_tree+0x81/0x2b0\n path_mount+0x47e/0x19d0\n do_mount+0xce/0xf0\n __x64_sys_mount+0x12c/0x1a0\n do_syscall_64+0x38/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node\nis larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size\npage.\n\n- recover_data\n - do_recover_data\n  - check_index_in_prev_nodes\n   - f2fs_data_blkaddr\n\nThis patch adds sanity check on summary info in recovery and GC flow\nin where the flows rely on them.\n\nAfter patch:\n[   29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-24T13:05:47.559Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/c6ad7fd16657ebd34a87a97d9588195aae87597d"
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      ],
      "title": "f2fs: fix to do sanity check on summary info",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50753",
    "datePublished": "2025-12-24T13:05:47.559Z",
    "dateReserved": "2025-12-24T13:02:21.544Z",
    "dateUpdated": "2025-12-24T13:05:47.559Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50753\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T13:16:02.033\",\"lastModified\":\"2025-12-24T13:16:02.033\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to do sanity check on summary info\\n\\nAs Wenqing Liu reported in bugzilla:\\n\\nhttps://bugzilla.kernel.org/show_bug.cgi?id=216456\\n\\nBUG: KASAN: use-after-free in recover_data+0x63ae/0x6ae0 [f2fs]\\nRead of size 4 at addr ffff8881464dcd80 by task mount/1013\\n\\nCPU: 3 PID: 1013 Comm: mount Tainted: G        W          6.0.0-rc4 #1\\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\\nCall Trace:\\n dump_stack_lvl+0x45/0x5e\\n print_report.cold+0xf3/0x68d\\n kasan_report+0xa8/0x130\\n recover_data+0x63ae/0x6ae0 [f2fs]\\n f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs]\\n f2fs_fill_super+0x4665/0x61e0 [f2fs]\\n mount_bdev+0x2cf/0x3b0\\n legacy_get_tree+0xed/0x1d0\\n vfs_get_tree+0x81/0x2b0\\n path_mount+0x47e/0x19d0\\n do_mount+0xce/0xf0\\n __x64_sys_mount+0x12c/0x1a0\\n do_syscall_64+0x38/0x90\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nThe root cause is: in fuzzed image, SSA table is corrupted: ofs_in_node\\nis larger than ADDRS_PER_PAGE(), result in out-of-range access on 4k-size\\npage.\\n\\n- recover_data\\n - do_recover_data\\n  - check_index_in_prev_nodes\\n   - f2fs_data_blkaddr\\n\\nThis patch adds sanity check on summary info in recovery and GC flow\\nin where the flows rely on them.\\n\\nAfter patch:\\n[   29.310883] F2FS-fs (loop0): Inconsistent ofs_in_node:65286 in summary, ino:0, nid:6, max:1018\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0922ad64ccefa3e483e84355942b86e13c8fea68\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4a8e8bf280703e04e0b9d91f101e1fdd9a5bd09e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73687c53919f49dff3852155621dab7a35c52854\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6ad7fd16657ebd34a87a97d9588195aae87597d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c99860f9a75079f339ed7670425b1ac58f26e2ff\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e168f819bfa42459b14f479e55ebd550bcc78899\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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  • 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.



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