GHSA-7F2H-763G-25CR
Vulnerability from github – Published: 2026-09-24 18:31 – Updated: 2026-09-24 18:31In the Linux kernel, the following vulnerability has been resolved:
wifi: libipw: fix key index receive bound checks
libipw_rx() reads skb->data[hdrlen + 3] to extract the WEP key index in both the software-decrypt key selection path and the hardware-decrypted IV/ICV strip path. In both places the existing guard only checks skb->len >= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the byte at hdrlen + 3.
Require hdrlen + 4 bytes before reading that item in both paths. This is a local source-boundary check only; it does not change the key index semantics.
{
"affected": [],
"aliases": [
"CVE-2026-93803"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-24T17:17:13Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: libipw: fix key index receive bound checks\n\nlibipw_rx() reads skb-\u003edata[hdrlen + 3] to extract the WEP key index in\nboth the software-decrypt key selection path and the hardware-decrypted\nIV/ICV strip path. In both places the existing guard only checks\nskb-\u003elen \u003e= hdrlen + 3, which proves bytes up to hdrlen + 2 but not the\nbyte at hdrlen + 3.\n\nRequire hdrlen + 4 bytes before reading that item in both paths. This is\na local source-boundary check only; it does not change the key index\nsemantics.",
"id": "GHSA-7f2h-763g-25cr",
"modified": "2026-09-24T18:31:29Z",
"published": "2026-09-24T18:31:29Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93803"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/062840bdc9ee06169b3c371bf66711f1d7ec0bf4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/74ed3669f26803b1761c1f55403062bea44c3466"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c54b643e9a0936d038921c547736574fd7382cea"
}
],
"schema_version": "1.4.0",
"severity": []
}
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