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CVE-2026-90300

Estado: RecibidaSin puntuar—

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

bpf: Clear buf on error in __bpf_get_task_stack

Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path.

Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.

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-2026-90300",
  "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": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
              "lessThan": "f523359c4789bb0396d2d642464a6e2fd4f2299d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df",
              "lessThan": "f5d242825ca417bb6afe35fde6e8880f97ca43fb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d921baabd96445ef9c9c9410ca06164359c8a1a5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "9c020a533eaae1c2d41a7e3835c4c818a9b4b656",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ff6bdc205fd0a83bd365405d4e31fb5905826996",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.10.30",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.11.14",
              "lessThan": "5.12",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.10.96",
              "lessThan": "5.11",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "kernel/bpf/stackmap.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/stackmap.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:27.503",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Clear buf on error in __bpf_get_task_stack\n\nBoth bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that\nuse __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM\nargument and we should initialize the buf on every return path.\n\nAdding missing buf memset for __bpf_get_task_stack fail paths. This\nprovides deterministic buffer contents, which is useful when the buffer\nis used directly as a map key."
    }
  ],
  "lastModified": "2026-09-17T17:17:27.503",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}