CVE-2026-43498 (GCVE-0-2026-43498)
Vulnerability from cvelistv5
Published
2026-05-21 12:17
Modified
2026-08-05 12:28
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/ivpu: Disallow re-exporting imported GEM objects Prevent re-exporting of imported GEM buffers by adding a custom prime_handle_to_fd callback that checks if the object is imported and returns -EOPNOTSUPP if so. Re-exporting imported GEM buffers causes loss of buffer flags settings, leading to incorrect device access and data corruption.
References
Impacted products
Vendor Product Version
Linux Linux Version: 57557964b582238d5ee4b8538d1c4694f91c2186
Version: 57557964b582238d5ee4b8538d1c4694f91c2186
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/ivpu/ivpu_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3756043dd695bba34cc728cdc5688dcb49ac8043",
              "status": "affected",
              "version": "57557964b582238d5ee4b8538d1c4694f91c2186",
              "versionType": "git"
            },
            {
              "lessThan": "7dd57d7a6350770dfc283287125c409e995200e0",
              "status": "affected",
              "version": "57557964b582238d5ee4b8538d1c4694f91c2186",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accel/ivpu/ivpu_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.7",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Disallow re-exporting imported GEM objects\n\nPrevent re-exporting of imported GEM buffers by adding a custom\nprime_handle_to_fd callback that checks if the object is imported\nand returns -EOPNOTSUPP if so.\n\nRe-exporting imported GEM buffers causes loss of buffer flags settings,\nleading to incorrect device access and data corruption."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The accel/ivpu NPU driver is reachable only through local `/dev/accel/accelX` ioctls (BO_CREATE_FROM_USERPTR, PRIME_HANDLE_TO_FD/FD_TO_HANDLE, SUBMIT); it is not network- or adjacent-facing.\nAC:L - The exploit is a fully attacker-controlled, deterministic sequence (create RO userptr BO, re-export, re-import losing the RO flag, submit a write job) with no race or uncontrolled memory-layout dependency.\nPR:L - No root or capability is required\u2014only access to the accel device node, which unprivileged local users typically hold on NPU-equipped systems; the ioctls carry no DRM_ROOT_ONLY/capable() gate.\nUI:N - The attacker performs every step (BO creation, re-export/re-import, NPU job submission) without any victim action.\nS:U - Impacted memory is all under the kernel\u0027s authority and the DMA/IOMMU isolation itself is not bypassed (pages are legitimately mapped, only the device-MMU read-only bit is dropped); this is standard in-OS privilege escalation.\nC:H - The resulting write primitive into shared read-only page-cache/executable pages can be leveraged for code execution in privileged contexts and thus arbitrary memory disclosure, and per guidance such memory corruption is scored High.\nI:H - The device, under attacker control, gains an arbitrary write into host pages that must be read-only (shared/file-backed/CoW pages), yielding controlled corruption of memory belonging to other contexts.\nA:H - Corrupting shared page-cache/executable pages or other processes\u0027 memory readily crashes processes and the system, a High availability impact consistent with memory-corruption guidance."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:28:20.973Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3756043dd695bba34cc728cdc5688dcb49ac8043"
        },
        {
          "url": "https://git.kernel.org/stable/c/7dd57d7a6350770dfc283287125c409e995200e0"
        }
      ],
      "title": "accel/ivpu: Disallow re-exporting imported GEM objects",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43498",
    "datePublished": "2026-05-21T12:17:48.550Z",
    "dateReserved": "2026-05-01T14:12:56.014Z",
    "dateUpdated": "2026-08-05T12:28:20.973Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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