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CVE-2026-98887

unscored Published
NVD · CVE.org

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.

Fix

Microsoft's update · Moderate

  • Release Notes — azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 · build 6.6.159.1-1

From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-31.

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. StatusReceived → PublishedNVD modified 2026-10-26 06:56
  2. StatusPublished → ReceivedNVD modified 2026-10-26 07:17
  3. StatusReceived → PublishedNVD modified 2026-10-23 11:37
  4. StatusPublished → ReceivedNVD modified 2026-10-23 12:18
  5. First seenunscored · linuxNVD modified 2026-10-23 11:37

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 7