wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO
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
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.271, 5.15.222, 6.1.189, 6.12.111, 6.18.53, 6.6.158
- CVEs
- CVE-2026-98887
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 6 Nov 2026, 02:28 UTC · Revision 1
Source evidence
wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO
core-osv · Original sourcePublished 23 Oct 2026, 11:37 UTC
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.
osv:CVE-2026-98887
Kernel
Fixed versions: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53
Complete source record
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"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.",
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"modified": "2026-10-28T02:30:45.962222304Z",
"provider": "osv",
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"https://nvd.nist.gov/vuln/detail/CVE-2026-98887",
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"security_relevant": true,
"severity_evidence": null
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"source_id": "core-osv",
"document_id": 514274,
"published_at": "2026-10-23T11:37:44.605+00:00"
}