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CVE-2026-64507

Estado: RecibidaSin puntuar—

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

x86/bugs: Enable IBPB flush on BPF JIT allocation

Enable hardening against JIT spraying when Spectre-v2 mitigations are in use. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip enabling the IBPB flush if the BPF dispatcher is already using a retpoline sequence.

This hardening applies only when BPF-JIT is in use. Guard the enabling under CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n.

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-2026-64507",
  "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": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "25dbcd31781e2bc3cd63d873af1fcd06f863a126",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "cb27f3bf915cc0f20fc0c48da9059304e39ebd35",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "9354248fc1c33a844ca1872761f6668b393e8c37",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "52440e15d9628f8f239373c0f2e5e8f92feea2df",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
              "lessThan": "a3af84b0fa00ead01fcd0e28b5d773ff25990a0d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/x86/include/asm/nospec-branch.h",
            "arch/x86/kernel/cpu/bugs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.18",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "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": "6.18.39",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/x86/include/asm/nospec-branch.h",
            "arch/x86/kernel/cpu/bugs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-25T10:17:36.810",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/25dbcd31781e2bc3cd63d873af1fcd06f863a126",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/bugs: Enable IBPB flush on BPF JIT allocation\n\nEnable hardening against JIT spraying when Spectre-v2 mitigations are in\nuse. Specifically, issue an IBPB flush on BPF JIT memory reuse. Skip\nenabling the IBPB flush if the BPF dispatcher is already using a retpoline\nsequence.\n\nThis hardening applies only when BPF-JIT is in use. Guard the enabling\nunder CONFIG_BPF_JIT so that bugs.c still builds with CONFIG_BPF_JIT=n."
    }
  ],
  "lastModified": "2026-08-19T17:20:15.123",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}