{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64507",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.793Z",
        "datePublished": "2026-07-25T08:52:01.008Z",
        "dateUpdated": "2026-08-19T16:28:18.513Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-19T16:28:18.513Z"
            },
            "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."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/include/asm/nospec-branch.h",
                        "arch/x86/kernel/cpu/bugs.c"
                    ],
                    "versions": [
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "25dbcd31781e2bc3cd63d873af1fcd06f863a126",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "cb27f3bf915cc0f20fc0c48da9059304e39ebd35",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "9354248fc1c33a844ca1872761f6668b393e8c37",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "52440e15d9628f8f239373c0f2e5e8f92feea2df",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "57631054fae6dcc9c892ae6310b58bbb6f6e5048",
                            "lessThan": "a3af84b0fa00ead01fcd0e28b5d773ff25990a0d",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/include/asm/nospec-branch.h",
                        "arch/x86/kernel/cpu/bugs.c"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.39",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.4",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.6.145"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.12.97"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.18.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.1.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/25dbcd31781e2bc3cd63d873af1fcd06f863a126"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cb27f3bf915cc0f20fc0c48da9059304e39ebd35"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9354248fc1c33a844ca1872761f6668b393e8c37"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8a4c8af9ae67eb072d90d1b339f14d27a82bd2a1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/52440e15d9628f8f239373c0f2e5e8f92feea2df"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3af84b0fa00ead01fcd0e28b5d773ff25990a0d"
                }
            ],
            "title": "x86/bugs: Enable IBPB flush on BPF JIT allocation",
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                "engine": "bippy-1.2.0"
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    }
}