x86/bugs: Enable IBPB flush on BPF JIT allocation

{
  "id": "c13ade0a096c749607a88285401a355632bbd0e7530918ae5aef22b117b66170",
  "url": "https://osv.dev/vulnerability/CVE-2026-64507",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "x86/bugs: Enable IBPB flush on BPF JIT allocation",
    "summary": "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.",
    "evidence": "osv:CVE-2026-64507",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.145",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.97",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-64507",
      "aliases": [
        "CVE-2026-64507"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "57631054fae6dcc9c892ae6310b58bbb6f6e5048"
                },
                {
                  "fixed": "25dbcd31781e2bc3cd63d873af1fcd06f863a126"
                },
                {
                  "fixed": "cb27f3bf915cc0f20fc0c48da9059304e39ebd35"
                },
                {
                  "fixed": "9354248fc1c33a844ca1872761f6668b393e8c37"
                },
                {
                  "fixed": "8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"
                },
                {
                  "fixed": "52440e15d9628f8f239373c0f2e5e8f92feea2df"
                },
                {
                  "fixed": "a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64507.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "6.1.183"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.145"
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              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.97"
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.13.0"
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                  "fixed": "6.18.39"
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            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64507.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.326491219Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/25dbcd31781e2bc3cd63d873af1fcd06f863a126",
        "https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df",
        "https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1",
        "https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37",
        "https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d",
        "https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64507.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64507",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64507.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64507",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497004,
  "published_at": "2026-07-25T08:52:01.008+00:00"
}