CVE-2022-48828 (GCVE-0-2022-48828)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:44 – Updated: 2026-08-05 08:52
VLAI
Title
NFSD: Fix ia_size underflow
Summary
In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr().
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:57 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < d2211e6e34d0755f35e2f8c22d81999fa81cfc71 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8e0ecaf7a7e57b30284d6b3289cc436100fadc48 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < da22ca1ad548429d7822011c54cfe210718e0aa7 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e6faac3f58c7c4176b66f63def17a34232a17b0e (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.4.295 , ≤ 5.4.* (semver)
Unaffected: 5.10.220 , ≤ 5.10.* (semver)
Unaffected: 5.15.24 , ≤ 5.15.* (semver)
Unaffected: 5.16.10 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens RUGGEDCOM RST2428P Unaffected: 0 , < * (custom)
guessed Create a notification for this product.
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Unaffected: 0 , < * (custom)
guessed Create a notification for this product.
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family Unaffected: 0 , < * (custom)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
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              "url": "https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48"
            },
            {
              "url": "https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7"
            },
            {
              "url": "https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0e"
            }
          ],
          "title": "NFSD: Fix ia_size underflow",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48828",
        "datePublished": "2024-07-16T11:44:12.660Z",
        "dateReserved": "2024-07-16T11:38:08.903Z",
        "dateUpdated": "2026-08-05T08:52:33.198Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





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

Author Source Type Date Other

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.



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.