CVE-2024-35924 (GCVE-0-2024-35924)

Vulnerability from cvelistv5 – Published: 2024-05-19 10:10 – Updated: 2026-10-30 12:18
VLAI
Title
usb: typec: ucsi: Limit read size on v1.2
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: Limit read size on v1.2 Between UCSI 1.2 and UCSI 2.0, the size of the MESSAGE_IN region was increased from 16 to 256. In order to avoid overflowing reads for older systems, add a mechanism to use the read UCSI version to truncate read sizes on UCSI v1.2.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-20 15:11 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bdc62f2bae8fb0e8e99574de5232f0a3c54a27df , < af9bdf05557dc21040df2f11062133dd1e503a09 (git)
Affected: bdc62f2bae8fb0e8e99574de5232f0a3c54a27df , < 266f403ec47573046dee4bcebda82777ce702c40 (git)
Affected: bdc62f2bae8fb0e8e99574de5232f0a3c54a27df , < 0defcaa09d3b21e8387829ee3a652c43fa91e13f (git)
Affected: bdc62f2bae8fb0e8e99574de5232f0a3c54a27df , < b3db266fb031fba88c423d4bb8983a73a3db6527 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.27 , ≤ 6.6.* (semver)
Unaffected: 6.8.6 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "source": "af854a3a-2127-422b-91ae-364da2661108",
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            "url": "https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f"
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
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              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-10-30T01:29:43+00:00",
      "cve": "CVE-2024-35924",
      "id": "CVE-2024-35924",
      "initial_release_date": "2024-05-19T00:00:00+00:00",
      "product_status:fixed": "709",
      "product_status:known_affected": "28",
      "product_status:known_not_affected": "22",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: usb: typec: ucsi: Limit read size on v1.2",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-35924.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-17T01:10:08Z",
      "cve": "CVE-2024-35924",
      "id": "CVE-2024-35924",
      "initial_release_date": "2024-05-21T01:59:10Z",
      "product_status:known_affected": "315",
      "product_status:known_not_affected": "171",
      "product_status:recommended": "721",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-35924",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2024/cve-2024-35924.json",
      "version": "110"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-02T03:21:48.935Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
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                "url": "https://git.kernel.org/stable/c/266f403ec47573046dee4bcebda82777ce702c40"
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                "url": "https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f"
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                ],
                "url": "https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-35924",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-05-20T15:11:13.299971Z",
                    "version": "2.0.3"
                  },
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              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-05-23T19:01:24.910Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
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              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/usb/typec/ucsi/ucsi.c",
                "drivers/usb/typec/ucsi/ucsi.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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              "versions": [
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                  "versionType": "git"
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                  "status": "affected",
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                  "versionType": "git"
                },
                {
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                  "status": "affected",
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            },
            {
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              "product": "Linux",
              "programFiles": [
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                "drivers/usb/typec/ucsi/ucsi.h"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                  "status": "affected",
                  "version": "5.5"
                },
                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.191",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.27",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.8.*",
                  "status": "unaffected",
                  "version": "6.8.6",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.9",
                  "versionType": "original_commit_for_fix"
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              ]
            }
          ],
          "cpeApplicability": [
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              "nodes": [
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                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.191",
                      "versionStartIncluding": "5.5",
                      "vulnerable": true
                    },
                    {
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                      "versionEndExcluding": "6.6.27",
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                    },
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                  "negate": false,
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              ]
            }
          ],
          "descriptions": [
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              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: Limit read size on v1.2\n\nBetween UCSI 1.2 and UCSI 2.0, the size of the MESSAGE_IN region was\nincreased from 16 to 256. In order to avoid overflowing reads for older\nsystems, add a mechanism to use the read UCSI version to truncate read\nsizes on UCSI v1.2."
            }
          ],
          "metrics": [
            {
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                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The UCSI core is a local platform driver (ACPI OpRegion, I2C, or pmic_glink transport) with no network or adjacent-network exposure; the over-read is driven by local UCSI transactions and the leaked bytes are harvested locally through /sys/class/typec and /sys/class/power_supply attributes or the UCSI debugfs response file.\nAC:L - There is no race and no dependence on memory layout the attacker cannot influence \u2014 any UCSI command requesting more than 16 bytes on a PPM reporting version \u22641.2 deterministically reads past the MESSAGE_IN window, and UCSI 1.x PPMs were the common case on shipping hardware.\nPR:L - The typec class attributes populated from the over-read buffers (usb_power_delivery_revision, number_of_alternate_modes, power_operation_mode, supported_accessory_modes) and the ucsi power-supply properties derived from src_pdos are all DEVICE_ATTR_RO/0444, so an ordinary unprivileged local user can read the disclosed bytes; no capability or root is required to observe the leak.\nUI:N - The oversized MESSAGE_IN reads are issued by the driver itself during registration, resume, and connector-change work handling; no victim action is needed for the out-of-bounds access to occur or for its results to be exposed.\nS:U - The out-of-bounds read stays within the kernel\u0027s own memory (memremap\u0027d OpRegion, or the slab objects backing struct pmic_glink_ucsi / struct ucsi_ccg) and is consumed by the same kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 240 bytes beyond the 16-byte MESSAGE_IN window can be copied out \u2014 past read_buf[48] inside struct pmic_glink_ucsi, past the trailing op_data member of struct ucsi_ccg, or past the ACPI OpRegion \u2014 which is far more than a strictly bounded few-byte read and can expose adjacent heap contents (including pointers) through world-readable sysfs.\nI:N - The defect is purely an over-long read; every destination buffer is sized to the requested length, so no out-of-bounds write, allocation-size confusion, or control-flow corruption primitive is created.\nA:H - Reading hundreds of bytes past the end of a memremap\u0027d ACPI/MMIO OpRegion can fault on platforms where the mapping does not extend that far, and the slab over-reads in the ccg and glink backends trip KASAN, so the bug can take the machine down."
                }
              ]
            }
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            "dateUpdated": "2026-10-30T12:18:20.791Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
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              "url": "https://git.kernel.org/stable/c/af9bdf05557dc21040df2f11062133dd1e503a09"
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            },
            {
              "url": "https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527"
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          ],
          "title": "usb: typec: ucsi: Limit read size on v1.2",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-35924",
        "datePublished": "2024-05-19T10:10:35.044Z",
        "dateReserved": "2024-05-17T13:50:33.125Z",
        "dateUpdated": "2026-10-30T12:18:20.791Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Sightings

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Nomenclature

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