GHSA-8JG9-F732-244H
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In the Linux kernel, the following vulnerability has been resolved:
KEYS: encrypted: fix integer overflow of datablob_len
encrypted_key_alloc() stores datablob_len in a u16. It is computed from multiple string and payload lengths. If the result exceeds U16_MAX, the assignment truncates the allocation size. KASAN reports a 32760-byte slab-out-of-bounds write when __ekey_init() copies the master key description into the undersized buffer.
The total payload length stored in key->datalen is also a u16. Use check_add_overflow() to reject values that do not fit either destination, and use kzalloc_flex() for the flexible-array allocation.
{
"affected": [],
"aliases": [
"CVE-2026-98222"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:09Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKEYS: encrypted: fix integer overflow of datablob_len\n\nencrypted_key_alloc() stores datablob_len in a u16. It is computed from\nmultiple string and payload lengths. If the result exceeds U16_MAX, the\nassignment truncates the allocation size. KASAN reports a 32760-byte\nslab-out-of-bounds write when __ekey_init() copies the master key\ndescription into the undersized buffer.\n\nThe total payload length stored in key-\u003edatalen is also a u16. Use\ncheck_add_overflow() to reject values that do not fit either destination,\nand use kzalloc_flex() for the flexible-array allocation.",
"id": "GHSA-8jg9-f732-244h",
"modified": "2026-10-06T09:31:31Z",
"published": "2026-10-06T09:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98222"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1e720f63dbafc093a8f5d519f05b67724993edd4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8697c431e297eb0d0ab13dda6bc172b48a34f05c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1a98eca102b1cbbc37ff9eaa197ae4e6a3ea4b0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cca38f2102a4cd35eda8d48950df4817b4b24757"
}
],
"schema_version": "1.4.0",
"severity": []
}
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