CVE-2025-38163 (GCVE-0-2025-38163)

Vulnerability from cvelistv5 – Published: 2025-07-03 08:36 – Updated: 2026-05-11 21:22
VLAI
Title
f2fs: fix to do sanity check on sbi->total_valid_block_count
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on sbi->total_valid_block_count syzbot reported a f2fs bug as below: ------------[ cut here ]------------ kernel BUG at fs/f2fs/f2fs.h:2521! RIP: 0010:dec_valid_block_count+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521 Call Trace: f2fs_truncate_data_blocks_range+0xc8c/0x11a0 fs/f2fs/file.c:695 truncate_dnode+0x417/0x740 fs/f2fs/node.c:973 truncate_nodes+0x3ec/0xf50 fs/f2fs/node.c:1014 f2fs_truncate_inode_blocks+0x8e3/0x1370 fs/f2fs/node.c:1197 f2fs_do_truncate_blocks+0x840/0x12b0 fs/f2fs/file.c:810 f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:838 f2fs_truncate+0x417/0x720 fs/f2fs/file.c:888 f2fs_setattr+0xc4f/0x12f0 fs/f2fs/file.c:1112 notify_change+0xbca/0xe90 fs/attr.c:552 do_truncate+0x222/0x310 fs/open.c:65 handle_truncate fs/namei.c:3466 [inline] do_open fs/namei.c:3849 [inline] path_openat+0x2e4f/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_creat fs/open.c:1522 [inline] __se_sys_creat fs/open.c:1516 [inline] __x64_sys_creat+0x124/0x170 fs/open.c:1516 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 The reason is: in fuzzed image, sbi->total_valid_block_count is inconsistent w/ mapped blocks indexed by inode, so, we should not trigger panic for such case, instead, let's print log and set fsck flag.
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: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < 49bc7bf38e42cfa642787e947f5721696ea73ac3 (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < f1b743c1955151bd392539b739a3ad155296be13 (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < 6a324d77f7ea1a91d55c4b6ad970e3ac9ab6a20d (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < 25f3776b58c1c45ad2e50ab4b263505b4d2378ca (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < a39cc43efc1bca74ed9d6cf9e60b995071f7d178 (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < 65b3f76592aed5a43c4d79375ac097acf975972b (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < ccc28c0397f75a3ec9539cceed9db014d7b73869 (git)
Affected: 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 , < 05872a167c2cab80ef186ef23cc34a6776a1a30c (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.239 , ≤ 5.10.* (semver)
Unaffected: 5.15.186 , ≤ 5.15.* (semver)
Unaffected: 6.1.142 , ≤ 6.1.* (semver)
Unaffected: 6.6.94 , ≤ 6.6.* (semver)
Unaffected: 6.12.34 , ≤ 6.12.* (semver)
Unaffected: 6.15.3 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on sbi-\u003etotal_valid_block_count\n\nsyzbot reported a f2fs bug as below:\n\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/f2fs.h:2521!\nRIP: 0010:dec_valid_block_count+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521\nCall Trace:\n f2fs_truncate_data_blocks_range+0xc8c/0x11a0 fs/f2fs/file.c:695\n truncate_dnode+0x417/0x740 fs/f2fs/node.c:973\n truncate_nodes+0x3ec/0xf50 fs/f2fs/node.c:1014\n f2fs_truncate_inode_blocks+0x8e3/0x1370 fs/f2fs/node.c:1197\n f2fs_do_truncate_blocks+0x840/0x12b0 fs/f2fs/file.c:810\n f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:838\n f2fs_truncate+0x417/0x720 fs/f2fs/file.c:888\n f2fs_setattr+0xc4f/0x12f0 fs/f2fs/file.c:1112\n notify_change+0xbca/0xe90 fs/attr.c:552\n do_truncate+0x222/0x310 fs/open.c:65\n handle_truncate fs/namei.c:3466 [inline]\n do_open fs/namei.c:3849 [inline]\n path_openat+0x2e4f/0x35d0 fs/namei.c:4004\n do_filp_open+0x284/0x4e0 fs/namei.c:4031\n do_sys_openat2+0x12b/0x1d0 fs/open.c:1429\n do_sys_open fs/open.c:1444 [inline]\n __do_sys_creat fs/open.c:1522 [inline]\n __se_sys_creat fs/open.c:1516 [inline]\n __x64_sys_creat+0x124/0x170 fs/open.c:1516\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94\n\nThe reason is: in fuzzed image, sbi-\u003etotal_valid_block_count is\ninconsistent w/ mapped blocks indexed by inode, so, we should\nnot trigger panic for such case, instead, let\u0027s print log and\nset fsck flag."
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                    "versionEndExcluding": "6.15.3",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on sbi-\u003etotal_valid_block_count\n\nsyzbot reported a f2fs bug as below:\n\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/f2fs.h:2521!\nRIP: 0010:dec_valid_block_count+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521\nCall Trace:\n f2fs_truncate_data_blocks_range+0xc8c/0x11a0 fs/f2fs/file.c:695\n truncate_dnode+0x417/0x740 fs/f2fs/node.c:973\n truncate_nodes+0x3ec/0xf50 fs/f2fs/node.c:1014\n f2fs_truncate_inode_blocks+0x8e3/0x1370 fs/f2fs/node.c:1197\n f2fs_do_truncate_blocks+0x840/0x12b0 fs/f2fs/file.c:810\n f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:838\n f2fs_truncate+0x417/0x720 fs/f2fs/file.c:888\n f2fs_setattr+0xc4f/0x12f0 fs/f2fs/file.c:1112\n notify_change+0xbca/0xe90 fs/attr.c:552\n do_truncate+0x222/0x310 fs/open.c:65\n handle_truncate fs/namei.c:3466 [inline]\n do_open fs/namei.c:3849 [inline]\n path_openat+0x2e4f/0x35d0 fs/namei.c:4004\n do_filp_open+0x284/0x4e0 fs/namei.c:4031\n do_sys_openat2+0x12b/0x1d0 fs/open.c:1429\n do_sys_open fs/open.c:1444 [inline]\n __do_sys_creat fs/open.c:1522 [inline]\n __se_sys_creat fs/open.c:1516 [inline]\n __x64_sys_creat+0x124/0x170 fs/open.c:1516\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94\n\nThe reason is: in fuzzed image, sbi-\u003etotal_valid_block_count is\ninconsistent w/ mapped blocks indexed by inode, so, we should\nnot trigger panic for such case, instead, let\u0027s print log and\nset fsck flag."
          },
          {
            "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 sbi-\u0026gt;total_valid_block_count syzbot inform\u00f3 un error de f2fs como el siguiente: ------------[ cortar aqu\u00ed ]------------ \u00a1ERROR del kernel en fs/f2fs/f2fs.h:2521! RIP: 0010:dec_valid_block_count+0x3b2/0x3c0 fs/f2fs/f2fs.h:2521 Rastreo de llamadas:  f2fs_truncate_data_blocks_range+0xc8c/0x11a0 fs/f2fs/file.c:695 truncate_dnode+0x417/0x740 fs/f2fs/node.c:973 truncate_nodes+0x3ec/0xf50 fs/f2fs/node.c:1014 f2fs_truncate_inode_blocks+0x8e3/0x1370 fs/f2fs/node.c:1197 f2fs_do_truncate_blocks+0x840/0x12b0 fs/f2fs/file.c:810 f2fs_truncate_blocks+0x10d/0x300 fs/f2fs/file.c:838 f2fs_truncate+0x417/0x720 fs/f2fs/file.c:888 f2fs_setattr+0xc4f/0x12f0 fs/f2fs/file.c:1112 notify_change+0xbca/0xe90 fs/attr.c:552 do_truncate+0x222/0x310 fs/open.c:65 handle_truncate fs/namei.c:3466 [inline] do_open fs/namei.c:3849 [inline] path_openat+0x2e4f/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_creat fs/open.c:1522 [inline] __se_sys_creat fs/open.c:1516 [inline] __x64_sys_creat+0x124/0x170 fs/open.c:1516 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 El La raz\u00f3n es: en la imagen difusa, sbi-\u0026gt;total_valid_block_count es inconsistente con los bloques mapeados indexados por inodo, por lo tanto, no deber\u00edamos generar p\u00e1nico en tal caso, en su lugar, imprimamos el registro y configuremos el indicador fsck."
          }
        ],
        "id": "CVE-2025-38163",
        "lastModified": "2026-06-17T09:16:18.027",
        "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": "2025-07-03T09:15:31.727",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/05872a167c2cab80ef186ef23cc34a6776a1a30c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/25f3776b58c1c45ad2e50ab4b263505b4d2378ca"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/49bc7bf38e42cfa642787e947f5721696ea73ac3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/65b3f76592aed5a43c4d79375ac097acf975972b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6a324d77f7ea1a91d55c4b6ad970e3ac9ab6a20d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a39cc43efc1bca74ed9d6cf9e60b995071f7d178"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ccc28c0397f75a3ec9539cceed9db014d7b73869"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f1b743c1955151bd392539b739a3ad155296be13"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:32:16+00:00",
      "cve": "CVE-2025-38163",
      "id": "CVE-2025-38163",
      "initial_release_date": "2025-07-03T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix to do sanity check on sbi-\u003etotal_valid_block_count",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38163.json",
      "version": "3"
    }
  }
}



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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.
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  • 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.


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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.