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vuln-cve/data/2026/53xxx/CVE-2026-53306.json
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{
"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": "2026-11-06T16:34:19.674Z"
},
"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"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.6.29",
"versionEndExcluding": "6.6.141"
},
{
"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",
"versionEndExcluding": "6.18.33"
},
{
"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"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-53306",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-11-06T16:26:13.374243Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-06T16:34:19.674Z"
}
}
]
}
}