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vuln-cve/data/2025/68xxx/CVE-2025-68724.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-68724",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-12-24T10:30:51.027Z",
"datePublished": "2025-12-24T10:33:08.932Z",
"dateUpdated": "2026-11-10T12:38:16.189Z"
},
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id\n\nUse check_add_overflow() to guard against potential integer overflows\nwhen adding the binary blob lengths and the size of an asymmetric_key_id\nstructure and return ERR_PTR(-EOVERFLOW) accordingly. This prevents a\npossible buffer overflow when copying data from potentially malicious\nX.509 certificate fields that can be arbitrarily large, such as ASN.1\nINTEGER serial numbers, issuer names, etc."
}
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"baseSeverity": "HIGH"
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"value": "AV:L - The vulnerable X.509 parsing path is reached through the local add_key syscall and related local PKCS#7 consumers, not directly through network packet processing.\nAC:L - The overflow is deterministic from attacker-controlled certificate field lengths and requires no race, victim-controlled state, or unpredictable condition.\nPR:L - An ordinary unprivileged user can submit an asymmetric key to a writable process or session keyring without capabilities. Parsing occurs before certificate trust and keyring restriction checks.\nUI:N - The attacker directly invokes the keyring interface with the crafted certificate, requiring no action by another user.\nS:U - Exploitation compromises the kernel within the same host security authority and does not inherently cross a VM, IOMMU, or other distinct security boundary.\nC:H - The undersized allocation followed by oversized memcpy operations can corrupt kernel heap objects and potentially enable kernel code execution with arbitrary memory disclosure.\nI:H - The heap out-of-bounds writes can overwrite adjacent objects, function pointers, or credentials, potentially enabling arbitrary kernel writes and control-flow hijacking.\nA:H - The overflow can immediately produce an oops or kernel panic and can be triggered repeatedly by an unprivileged local attacker."
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