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CVE-2024-56557 (GCVE-0-2024-56557)

Vulnerability from cvelistv5 – Published: 2024-12-27 14:23 – Updated: 2026-08-05 11:45
VLAI
Title
iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer
Summary
In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer The AD7923 was updated to support devices with 8 channels, but the size of tx_buf and ring_xfer was not increased accordingly, leading to a potential buffer overflow in ad7923_update_scan_mode().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-18 16:03 UTC
CWE
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 851644a60d200c9a294de5a5594004bcf13d34c7 , < 6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3 (git)
Affected: 851644a60d200c9a294de5a5594004bcf13d34c7 , < 00663d3e000c31d0d49ef86a809f5c107c2d09cd (git)
Affected: 851644a60d200c9a294de5a5594004bcf13d34c7 , < e5cac32721997cb8bcb208a29f4598b3faf46338 (git)
Affected: 851644a60d200c9a294de5a5594004bcf13d34c7 , < 218ecc35949129171ca39bcc0d407c8dc4cd0bbc (git)
Affected: 851644a60d200c9a294de5a5594004bcf13d34c7 , < 3a4187ec454e19903fd15f6e1825a4b84e59a4cd (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.64 , ≤ 6.6.* (semver)
Unaffected: 6.12.4 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  },
                  {
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2025-02-18T16:03:56.635182Z",
                "version": "2.0.3"
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            "tags": [
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          },
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            "url": "https://git.kernel.org/stable/c/6e4d236d9c4b38571c394d3ab6e85dfb71c33ed3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e5cac32721997cb8bcb208a29f4598b3faf46338"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
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            "description": [
              {
                "lang": "en",
                "value": "CWE-120"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T03:52:55+00:00",
      "cve": "CVE-2024-56557",
      "id": "CVE-2024-56557",
      "initial_release_date": "2024-12-27T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-56557.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T01:04:11Z",
      "cve": "CVE-2024-56557",
      "id": "CVE-2024-56557",
      "initial_release_date": "2024-12-28T03:48:55Z",
      "product_status:known_affected": "423",
      "product_status:known_not_affected": "399",
      "product_status:recommended": "459",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-56557",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-56557.json",
      "version": "76"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T20:49:26.305Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
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            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
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                  "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"
                }
              },
              {
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                  "content": {
                    "id": "CVE-2024-56557",
                    "options": [
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                        "Exploitation": "none"
                      },
                      {
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                      },
                      {
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                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-02-18T16:03:56.635182Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
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              }
            ],
            "problemTypes": [
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                "descriptions": [
                  {
                    "cweId": "CWE-120",
                    "description": "CWE-120 Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-02-18T16:03:57.947Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
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              "product": "Linux",
              "programFiles": [
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              "versions": [
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                  "version": "5.6"
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
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                  "status": "unaffected",
                  "version": "5.15.203",
                  "versionType": "semver"
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                  "lessThanOrEqual": "6.1.*",
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                  "version": "6.1.120",
                  "versionType": "semver"
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                  "version": "6.6.64",
                  "versionType": "semver"
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                  "version": "6.12.4",
                  "versionType": "semver"
                },
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                  "status": "unaffected",
                  "version": "6.13",
                  "versionType": "original_commit_for_fix"
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                  "value": "AV:L - The overflow is reached only through local sysfs writes on the IIO device (`scan_elements/in_voltageN_en` then `buffer/enable`), which drive `iio_enable_buffers()` into `ad7923_update_scan_mode()`. No remote or adjacent network data reaches this code, and no physical access to the board is required.\nAC:L - The attacker fully controls the trigger \u2014 enabling five or more scan elements on an ad7908/ad7918/ad7928 and starting the buffer deterministically overflows `tx_buf` and `ring_xfer` on the first attempt, with no race to win and no state the attacker cannot set.\nPR:L - Nothing on the path checks any capability; only sysfs file permissions gate it, and on the embedded/industrial/Android systems where these SPI ADCs are deployed the IIO nodes are routinely handed to a non-root sensor or data-acquisition user or group by udev/ueventd rules. This matches the established scoring of the other IIO triggered-buffer CVEs reachable through the same interface.\nUI:N - The attacker performs the entire sequence \u2014 enabling scan elements, attaching a trigger, enabling the buffer \u2014 from their own process, and no other user needs to act.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel that contains the flaw, with no crossing of a hypervisor, IOMMU, or other security-authority boundary.\nC:H - The overflow overwrites `spi_message`/`spi_transfer` fields, so `spi_sync()` walks a corrupted transfer list and honors `tx_buf`/`rx_buf`/`len` values taken from smashed memory, and the resulting heap corruption is a general primitive that can be groomed into arbitrary kernel-memory disclosure.\nI:H - This is an out-of-bounds heap write of hundreds of bytes past `ring_xfer[4]`, including pointer values, that also clobbers `ring_msg.transfers.prev` mid-construction so `list_add_tail()` writes kernel pointers through an attacker-influenced address \u2014 a classic corruption-to-control-flow path.\nA:H - The clobbered `spi_message` list is immediately traversed by `spi_sync()` in `ad7923_trigger_handler()`, dereferencing wild `transfer_list` links, and the write past the end of the `iio_priv()` allocation corrupts adjacent slab state \u2014 a repeatable kernel oops or panic."
                }
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            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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            },
            {
              "url": "https://git.kernel.org/stable/c/3a4187ec454e19903fd15f6e1825a4b84e59a4cd"
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          ],
          "title": "iio: adc: ad7923: Fix buffer overflow for tx_buf and ring_xfer",
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        "assignerShortName": "Linux",
        "cveId": "CVE-2024-56557",
        "datePublished": "2024-12-27T14:23:03.251Z",
        "dateReserved": "2024-12-27T14:03:05.992Z",
        "dateUpdated": "2026-08-05T11:45:05.174Z",
        "state": "PUBLISHED"
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  }
}



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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

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.


Detection rules are retrieved from Rulezet.


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.