GHSA-VJMV-QR7M-GC5Q
Vulnerability from github – Published: 2026-10-23 12:31 – Updated: 2026-10-23 12:31In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO
hwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload to a struct hwsim_tx_rate * and unconditionally reads IEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds the attribute from above (NLA_BINARY .len is a maximum) and the op sets GENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is accepted and the loop reads past the payload.
Require the exact length in the policy, so a malformed attribute is rejected before the handler runs.
{
"affected": [],
"aliases": [
"CVE-2026-98887"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-23T12:18:22Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO\n\nhwsim_tx_info_frame_received_nl() casts the HWSIM_ATTR_TX_INFO payload\nto a struct hwsim_tx_rate * and unconditionally reads\nIEEE80211_TX_MAX_RATES entries (8 bytes) from it. The policy only bounds\nthe attribute from above (NLA_BINARY .len is a maximum) and the op sets\nGENL_DONT_VALIDATE_STRICT, so a short or zero-length attribute is\naccepted and the loop reads past the payload.\n\nRequire the exact length in the policy, so a malformed attribute is\nrejected before the handler runs.",
"id": "GHSA-vjmv-qr7m-gc5q",
"modified": "2026-10-23T12:31:36Z",
"published": "2026-10-23T12:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98887"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1ae85bb34fe3510659b86d6a5f8036dd498233f8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a96bb65b4b820d8b41fa155781ec1c29e3479d4"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3dc723ac78a6e4fa0fd49e27e487ed319da40a9f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/59e1f2a0242232b4a3af144ae317d3913fc09046"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5b1234bbfa25537fb9a5c0d62c328ed4547f721"
}
],
"schema_version": "1.4.0",
"severity": []
}
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