{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53306",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-06-09T07:44:35.397Z",
        "datePublished": "2026-06-26T19:41:01.338Z",
        "dateUpdated": "2026-06-26T19:41:01.338Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-26T19:41:01.338Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: hvc_iucv: fix off-by-one in number of supported devices\n\nMAX_HVC_IUCV_LINES == HVC_ALLOC_TTY_ADAPTERS == 8.\nThis is the number of entries in:\n  static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];\n\nSometimes hvc_iucv_table[] is limited by:\n(a)\tif (num > hvc_iucv_devices) // for error detection\nor\n(b)\tfor (i = 0; i < hvc_iucv_devices; i++) // in 2 places\n(so these 2 don't agree; second one appears to be correct to me.)\n\nhvc_iucv_devices can be 0..8. This is a counter.\n(c)\tif (hvc_iucv_devices > MAX_HVC_IUCV_LINES)\n\nIf hvc_iucv_devices == 8, (a) allows the code to access hvc_iucv_table[8].\nOops."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/hvc/hvc_iucv.c"
                    ],
                    "versions": [
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "484357dff256c816d9466bda35eb765685e4dc86",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "11207e42a332eb8bbcb9fe74df9edd2a807c5607",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "a76511bc654819425d3b15e77b523d7f9d81f064",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "3104a3f40feb107f77d7116ad9bf6c210ab7babf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "f1dc8e72de9aabe5d96767a4e97219ac26b79fe5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "44a01d5ba8a4d543694461cd3e178cfa6b3f221b",
                            "lessThan": "f2a880e802ad12d1e38039d1334fb1475d0f5241",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/hvc/hvc_iucv.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.29",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.29",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.258",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.209",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.175",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.141",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.91",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.33",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.10",
                            "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": "2.6.29",
                                    "versionEndExcluding": "5.10.258"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "5.15.209"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.1.175"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.6.141"
                                },
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "6.12.91"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
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                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "7.0.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.29",
                                    "versionEndExcluding": "7.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3d3b89e6ab93bdd0efd45828bda6b0e61cc46dff"
                },
                {
                    "url": "https://git.kernel.org/stable/c/484357dff256c816d9466bda35eb765685e4dc86"
                },
                {
                    "url": "https://git.kernel.org/stable/c/11207e42a332eb8bbcb9fe74df9edd2a807c5607"
                },
                {
                    "url": "https://git.kernel.org/stable/c/fed8b8f33a46db0ee2efdb000f4f630c86ed8ca4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a76511bc654819425d3b15e77b523d7f9d81f064"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3104a3f40feb107f77d7116ad9bf6c210ab7babf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f1dc8e72de9aabe5d96767a4e97219ac26b79fe5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f2a880e802ad12d1e38039d1334fb1475d0f5241"
                }
            ],
            "title": "tty: hvc_iucv: fix off-by-one in number of supported devices",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}