Files
vuln-cve/data/2026/43xxx/CVE-2026-43109.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-43109",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-05-01T14:12:55.986Z",
"datePublished": "2026-05-06T07:40:36.532Z",
"dateUpdated": "2026-11-06T15:32:31.640Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-17T15:21:37.731Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86: shadow stacks: proper error handling for mmap lock\n\n김영민 reports that shstk_pop_sigframe() doesn't check for errors from\nmmap_read_lock_killable(), which is a silly oversight, and also shows\nthat we haven't marked those functions with \"__must_check\", which would\nhave immediately caught it.\n\nSo let's fix both issues."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"arch/x86/kernel/shstk.c",
"include/linux/mmap_lock.h"
],
"versions": [
{
"version": "7fad2a432cd35bbf104d2d9d426e74902f22aa95",
"lessThan": "c79cf42321600e931933e11f94aba8b245d4cd66",
"status": "affected",
"versionType": "git"
},
{
"version": "7fad2a432cd35bbf104d2d9d426e74902f22aa95",
"lessThan": "1a30468eff661937d978495644d2e5ebfeef5ce6",
"status": "affected",
"versionType": "git"
},
{
"version": "7fad2a432cd35bbf104d2d9d426e74902f22aa95",
"lessThan": "c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4",
"status": "affected",
"versionType": "git"
},
{
"version": "7fad2a432cd35bbf104d2d9d426e74902f22aa95",
"lessThan": "262b6d38a81d51b135db81e1f30c13d30e38feee",
"status": "affected",
"versionType": "git"
},
{
"version": "7fad2a432cd35bbf104d2d9d426e74902f22aa95",
"lessThan": "52f657e34d7b21b47434d9d8b26fa7f6778b63a0",
"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/kernel/shstk.c",
"include/linux/mmap_lock.h"
],
"versions": [
{
"version": "6.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.6",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.140",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.88",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.24",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.19.14",
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0",
"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": "6.6",
"versionEndExcluding": "6.6.140"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6",
"versionEndExcluding": "6.12.88"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6",
"versionEndExcluding": "6.18.24"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6",
"versionEndExcluding": "6.19.14"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.6",
"versionEndExcluding": "7.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66"
},
{
"url": "https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6"
},
{
"url": "https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4"
},
{
"url": "https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee"
},
{
"url": "https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0"
}
],
"title": "x86: shadow stacks: proper error handling for mmap lock",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-43109",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-11-06T15:28:39.316247Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-06T15:32:31.640Z"
}
}
]
}
}