{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80891",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.799Z",
        "datePublished": "2026-09-04T17:11:07.555Z",
        "dateUpdated": "2026-09-04T17:11:07.555Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-09-04T17:11:07.555Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: pci: Validate AIBV and AISB before pinning guest pages\n\nThe AIBV holds one bit per MSI-X vector for a given function. The size of\nthe bit vector is derived from the NOI and the AIBVO. If the size of the\nAIBV exceeds a single page boundary, then reject the request as we cannot\nsafely pin the guest AIBV.\n\nSimilarly reject the request if the AISB address is not 8-byte aligned as\nthe architecture requires doubleword alignment for the summary bit address.\nSince the AISBO can address up to 64 bits, the size of the AISB can only be\n8 bytes for the function. This also ensures the AISB doesn't exceed a\nsingle page boundary."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/s390/kvm/pci.c"
                    ],
                    "versions": [
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "f00ef8efd41440129ccd88f4a1ebebf8d61d297f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "15df7700dd99f8a37f5c6ed2dcf1e33009cdba47",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "b878ba7e28144c9a857bc847d31f3c45413450ac",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc",
                            "lessThan": "868d32ac72cba21c5c6d8a66a814b7c25a3a5c01",
                            "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/s390/kvm/pci.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.183",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.151",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.103",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.44",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.8",
                            "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": "6.0",
                                    "versionEndExcluding": "6.1.183"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.6.151"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.12.103"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.18.44"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "7.1.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3a1c64220ede4ac9ef9a3e76f008ff60a34f4c48"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f00ef8efd41440129ccd88f4a1ebebf8d61d297f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/15df7700dd99f8a37f5c6ed2dcf1e33009cdba47"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b878ba7e28144c9a857bc847d31f3c45413450ac"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fbfe683f8b1ae7e40b56bdd6daf5bd671bc3a528"
                },
                {
                    "url": "https://git.kernel.org/stable/c/868d32ac72cba21c5c6d8a66a814b7c25a3a5c01"
                }
            ],
            "title": "KVM: s390: pci: Validate AIBV and AISB before pinning guest pages",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}