{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53370",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.401Z",
        "datePublished": "2026-07-19T09:10:30.990Z",
        "dateUpdated": "2026-07-19T09:10:30.990Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-19T09:10:30.990Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Improve validation and configuration of ACR masks\n\nCurrently there are several issues on the user space ACR mask validation\nand configuration.\n- The validation for user space ACR mask (attr.config2) is incomplete,\n  e.g., the ACR mask could include the index which belongs to another\n  ACR events group, but it's not validated.\n- An early return on an invalid ACR mask caused all subsequent ACR groups\n  to be skipped.\n- The stale hardware ACR mask (hw.config1) is not cleared before setting\n  new hardware ACR mask.\n\nThe following changes address all of the above issues.\n- Figure out the event index group of an ACR group. Any bits in the\n  user-space mask not present in the index group are now dropped.\n- Instead of an early return on invalid bits, drop only the invalid\n  portions and continue iterating through all ACR events to ensure full\n  configuration.\n- Explicitly clear the stale hardware ACR mask for each event prior to\n  writing the new configuration.\n\nBesides, a non-leader event member of ACR group could be disabled in\ntheory. This could cause bit-shifting errors in the acr_mask of remaining\ngroup members. But since ACR sampling requires all events to be active,\nthis should not be a big concern in real use case. Add a \"FIXME\" comment\nto notice this risk."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/events/intel/core.c"
                    ],
                    "versions": [
                        {
                            "version": "ec980e4facef8110f6fce27e5b6344660117f01f",
                            "lessThan": "aab56b95bee3ff79176b13443cd9d7cfe9747df0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec980e4facef8110f6fce27e5b6344660117f01f",
                            "lessThan": "c05e01cef47d9b4969eae2dcf9467e2a555bcb4f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ec980e4facef8110f6fce27e5b6344660117f01f",
                            "lessThan": "5ad732a56be46aabf158c16aa0c095291727aaef",
                            "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/events/intel/core.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.30",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.7",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.16",
                                    "versionEndExcluding": "6.18.30"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.0.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/aab56b95bee3ff79176b13443cd9d7cfe9747df0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c05e01cef47d9b4969eae2dcf9467e2a555bcb4f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5ad732a56be46aabf158c16aa0c095291727aaef"
                }
            ],
            "title": "perf/x86/intel: Improve validation and configuration of ACR masks",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}