Unrated

wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

Type: advisorySources: Official CVE List

In 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.

Products: Linux
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2026-98887
Confirmed fixed CVEs: Not specified
Updated in this feed: 29 Oct 2026, 18:03 UTC · Revision 2

Source evidence

wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

core-cve · Original source

Published 23 Oct 2026, 11:37 UTC

cve:CVE-2026-98887

Linux

Fixed versions: Not specified

Linux

Fixed versions: Not specified

Complete source record

{
  "id": "6b5c0c9cb526e7cd944799b7107d249969f56850f8071358805d11985103040b",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-98887",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO",
    "summary": "In 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.",
    "evidence": "cve:CVE-2026-98887",
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      "modified": "2026-10-26T06:56:11.864Z",
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      {
        "value": "CVE-2026-98887",
        "evidence": "/cveMetadata/cveId"
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    "security_relevant": true,
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  },
  "source_id": "core-cve",
  "document_id": 263345,
  "published_at": "2026-10-23T11:37:44.605+00:00"
}