{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80663",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.781Z",
        "datePublished": "2026-08-28T06:49:06.882Z",
        "dateUpdated": "2026-08-28T06:49:06.882Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-28T06:49:06.882Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntools/power/x86/intel-speed-select: Harden daemon pidfile open\n\nAvoid symlink-based pidfile clobbering by opening the pidfile with\nO_NOFOLLOW and validating it with fstat() before locking/writing.\n\nThe daemon currently uses a fixed pidfile path under /tmp. A local\nunprivileged user can pre-create a symlink at that path and cause a\nroot-run daemon instance to write into an attacker-chosen file."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "tools/power/x86/intel-speed-select/isst-daemon.c"
                    ],
                    "versions": [
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "905493a6338c82a70da16f86e0a6215db5a3d73d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "db938eb9a3c1317596c28e94413b33426508d51b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "72a07abc6b9046f07a08bba353cad7667bcc9dce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "19ffeb30fdfce63f8d6aca71bcdddb3f69d46278",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "e8adac69d1bdf035ef97cc914e845acd4ef08e28",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6",
                            "lessThan": "607af438e6430893a822964c841a1994b33acccc",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "tools/power/x86/intel-speed-select/isst-daemon.c"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "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": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "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": "6.1.178"
                                },
                                {
                                    "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": "6.18.40"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce"
                },
                {
                    "url": "https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28"
                },
                {
                    "url": "https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc"
                }
            ],
            "title": "tools/power/x86/intel-speed-select: Harden daemon pidfile open",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}