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CVE-2025-40050

Estado: AplazadaSin puntuar—

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

bpf: Skip scalar adjustment for BPF_NEG if dst is a pointer

In check_alu_op(), the verifier currently calls check_reg_arg() and adjust_scalar_min_max_vals() unconditionally for BPF_NEG operations. However, if the destination register holds a pointer, these scalar adjustments are unnecessary and potentially incorrect.

This patch adds a check to skip the adjustment logic when the destination register contains a pointer.

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-2025-40050",
  "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": "aced132599b3c8884c050218d4c48eef203678f6",
              "lessThan": "b9ef4963227246b9222e1559ddeec8e7af63e6c6",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "aced132599b3c8884c050218d4c48eef203678f6",
              "lessThan": "34904582b502a86fdb4d7984b12cacd2faabbe0d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-28T12:15:39.163",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/34904582b502a86fdb4d7984b12cacd2faabbe0d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b9ef4963227246b9222e1559ddeec8e7af63e6c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Skip scalar adjustment for BPF_NEG if dst is a pointer\n\nIn check_alu_op(), the verifier currently calls check_reg_arg() and\nadjust_scalar_min_max_vals() unconditionally for BPF_NEG operations.\nHowever, if the destination register holds a pointer, these scalar\nadjustments are unnecessary and potentially incorrect.\n\nThis patch adds a check to skip the adjustment logic when the destination\nregister contains a pointer."
    }
  ],
  "lastModified": "2026-06-17T09:21:11.013",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}