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CVE-2026-98887EUVD-2026-108681

wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, and 1 more
None on Exploit-DB, Metasploit or GitHub

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.

Timeline

  1. CVE published
  2. First seen by cve.now
  3. Record last updated

Affected versions

  • Linux Linux

    From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 3a96bb65b4b820d8b41fa155781ec1c29e3479d4; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 59e1f2a0242232b4a3af144ae317d3913fc09046; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 1ae85bb34fe3510659b86d6a5f8036dd498233f8; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 6f6368b20f8c9481fa7ba7b672dcb3c9f36b2695; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in b5b1234bbfa25537fb9a5c0d62c328ed4547f721; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 13edd8ea7ff2ce6a964b290ef2034cd8cbed96c7; From 5d44fe7c9808c56e136e59147bd932f5491520f1 · fixed in 3dc723ac78a6e4fa0fd49e27e487ed319da40a9f

  • Linux Linux

    5.7

  • KernelLinux

    fixed in 5.10.271; From 5.11.0 · fixed in 5.15.222; From 5.16.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53

References 7

git.kernel.org