CVE-2024-36931 (GCVE-0-2024-36931)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:29 – Updated: 2026-05-11 20:17
VLAI
Title
s390/cio: Ensure the copied buf is NUL terminated
Summary
In the Linux kernel, the following vulnerability has been resolved: s390/cio: Ensure the copied buf is NUL terminated Currently, we allocate a lbuf-sized kernel buffer and copy lbuf from userspace to that buffer. Later, we use scanf on this buffer but we don't ensure that the string is terminated inside the buffer, this can lead to OOB read when using scanf. Fix this issue by using memdup_user_nul instead.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-05 18:21 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6653 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a4f17cc726712a52122ad38540bc3ff3a052d1a4 , < c9d48ce163305595ae20aee27774192476d5e6a5 (git)
Affected: a4f17cc726712a52122ad38540bc3ff3a052d1a4 , < 10452edd175fcc4fd0f5ac782ed2a002e3e5d65c (git)
Affected: a4f17cc726712a52122ad38540bc3ff3a052d1a4 , < 84b38f48836662c4bfae646c014f4e981e16a2b2 (git)
Affected: a4f17cc726712a52122ad38540bc3ff3a052d1a4 , < 06759ebaf75c19c87b2453a5e130e9e61e9b5d65 (git)
Affected: a4f17cc726712a52122ad38540bc3ff3a052d1a4 , < da7c622cddd4fe36be69ca61e8c42e43cde94784 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.159 , ≤ 5.15.* (semver)
Unaffected: 6.1.91 , ≤ 6.1.* (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T12:14:08+00:00",
      "cve": "CVE-2024-36931",
      "id": "CVE-2024-36931",
      "initial_release_date": "2024-05-30T00:00:00+00:00",
      "product_status:known_not_affected": "199",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: s390/cio: Ensure the copied buf is NUL terminated",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-36931.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-36931",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-06-05T18:21:22.761012Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-06-05T18:21:29.890Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/s390/cio/cio_inject.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "c9d48ce16330",
                  "status": "affected",
                  "version": "a4f17cc72671",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
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                  "lessThan": "06759ebaf75c",
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                  "version": "a4f17cc72671",
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                {
                  "lessThan": "da7c622cddd4",
                  "status": "affected",
                  "version": "a4f17cc72671",
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              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.13"
                },
                {
                  "lessThan": "5.13",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "custom"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.159",
                  "versionType": "custom"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.91",
                  "versionType": "custom"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.31",
                  "versionType": "custom"
                },
                {
                  "lessThanOrEqual": "6.8.*",
                  "status": "unaffected",
                  "version": "6.8.10",
                  "versionType": "custom"
                },
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                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.9",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/cio: Ensure the copied buf is NUL terminated\n\nCurrently, we allocate a lbuf-sized kernel buffer and copy lbuf from\nuserspace to that buffer. Later, we use scanf on this buffer but we don\u0027t\nensure that the string is terminated inside the buffer, this can lead to\nOOB read when using scanf. Fix this issue by using memdup_user_nul instead."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-05-30T15:29:22.601Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
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              "url": "https://git.kernel.org/stable/c/c9d48ce163305595ae20aee27774192476d5e6a5"
            },
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              "url": "https://git.kernel.org/stable/c/10452edd175fcc4fd0f5ac782ed2a002e3e5d65c"
            },
            {
              "url": "https://git.kernel.org/stable/c/84b38f48836662c4bfae646c014f4e981e16a2b2"
            },
            {
              "url": "https://git.kernel.org/stable/c/06759ebaf75c19c87b2453a5e130e9e61e9b5d65"
            },
            {
              "url": "https://git.kernel.org/stable/c/da7c622cddd4fe36be69ca61e8c42e43cde94784"
            }
          ],
          "title": "s390/cio: Ensure the copied buf is NUL terminated",
          "x_generator": {
            "engine": "bippy-a5840b7849dd"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-36931",
        "datePublished": "2024-05-30T15:29:22.601Z",
        "dateReserved": "2024-05-30T15:25:07.071Z",
        "dateUpdated": "2024-06-05T18:21:39.257Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • 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 patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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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.