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CVE-2026-74381

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

gpu: host1x: Allow entries in BO caches to be freed

When a buffer object is pinned via host1x_bo_pin() with a cache, the resulting mapping is kept in the cache so it can be reused on subsequent pins. Each mapping held a reference to the underlying host1x_bo (taken in tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached, the bo itself could not be freed.

However, the only way to remove the cached mapping was through the free path of the buffer object. This meant that if a bo got cached, it could never get freed again.

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Resolve the circularity by holding a weak reference to the bo from the cache side. This is done by having the .pin callbacks not bump the bo's refcount -- instead the common Host1x bo code does so, except for the cache reference.

Also move the remove-cache-mapping-on-free code into a common function inside Host1x code. This is only called from the TegraDRM GEM buffers since those are the only ones that can be cached at the moment.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-74381",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "af755456299d44e4ed6af3b7c70a7f03ea37fdf1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "71c017b3f83ff72638f2a1b1d6d4e7bc61d30231",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "8c0d3cf0d5108c96317e0eca92b60dd368867cef",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "df63c76f9c8d881ca7bce1aecfba512328d0527d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f39b1dfa53c84b56d7ad37fed44afda7004959d",
              "lessThan": "3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/tegra/gem.c",
            "drivers/gpu/drm/tegra/submit.c",
            "drivers/gpu/host1x/bus.c",
            "include/linux/host1x.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/tegra/gem.c",
            "drivers/gpu/drm/tegra/submit.c",
            "drivers/gpu/host1x/bus.c",
            "include/linux/host1x.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:39.927",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/df63c76f9c8d881ca7bce1aecfba512328d0527d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Allow entries in BO caches to be freed\n\nWhen a buffer object is pinned via host1x_bo_pin() with a cache, the\nresulting mapping is kept in the cache so it can be reused on subsequent\npins. Each mapping held a reference to the underlying host1x_bo (taken\nin tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached,\nthe bo itself could not be freed.\n\nHowever, the only way to remove the cached mapping was through the free\npath of the buffer object. This meant that if a bo got cached, it could\nnever get freed again.\n\nResolve the circularity by holding a weak reference to the bo from the\ncache side. This is done by having the .pin callbacks not bump the bo's\nrefcount -- instead the common Host1x bo code does so, except for the\ncache reference.\n\nAlso move the remove-cache-mapping-on-free code into a common function\ninside Host1x code. This is only called from the TegraDRM GEM buffers\nsince those are the only ones that can be cached at the moment."
    }
  ],
  "lastModified": "2026-08-17T06:19:32.973",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}