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vuln-cve/data/2026/80xxx/CVE-2026-80640.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-80640",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-26T14:34:25.778Z",
"datePublished": "2026-08-28T06:48:52.650Z",
"dateUpdated": "2026-08-28T06:48:52.650Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-28T06:48:52.650Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/fwctl: Fix __fortify_panic\n\nFix a runtime assertion in cxlctl_get_supported_features(). Fortify\ncomplains that it is potentially overflowing the entries array per\n__counted_by_le(num_entries). Quiet the false positive by initializing\n@num_entries earlier.\n\n memcpy: detected buffer overflow: 48 byte write of buffer size 0\n WARNING: lib/string_helpers.c:1036 at __fortify_report+0x4d/0xa0, CPU#7: fwctl/1398\n RIP: 0010:__fortify_report+0x50/0xa0\n Call Trace:\n __fortify_panic+0xd/0xf\n cxlctl_get_supported_features.cold+0x23/0x35 [cxl_core]"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/cxl/core/features.c"
],
"versions": [
{
"version": "4d1c09cef2c244bd19467c016a3e56ba28ecc59d",
"lessThan": "b8d15e85596ad8993d42e0703a9741961a2f03eb",
"status": "affected",
"versionType": "git"
},
{
"version": "4d1c09cef2c244bd19467c016a3e56ba28ecc59d",
"lessThan": "18c67ecc5dafe14055edcea53f36f4e31df1816b",
"status": "affected",
"versionType": "git"
},
{
"version": "4d1c09cef2c244bd19467c016a3e56ba28ecc59d",
"lessThan": "6c9d2e87df40d606f1c85143e9acb1ecff463d5e",
"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/cxl/core/features.c"
],
"versions": [
{
"version": "6.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.15",
"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": "6.15",
"versionEndExcluding": "6.18.40"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.15",
"versionEndExcluding": "7.1.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.15",
"versionEndExcluding": "7.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/b8d15e85596ad8993d42e0703a9741961a2f03eb"
},
{
"url": "https://git.kernel.org/stable/c/18c67ecc5dafe14055edcea53f36f4e31df1816b"
},
{
"url": "https://git.kernel.org/stable/c/6c9d2e87df40d606f1c85143e9acb1ecff463d5e"
}
],
"title": "cxl/fwctl: Fix __fortify_panic",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}