CVE-2026-64117 (GCVE-0-2026-64117)
Vulnerability from cvelistv5
Published
2026-07-19 15:40
Modified
2026-10-21 12:43
Severity ?
8.8 (High) - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb ieee80211_invoke_fast_rx() reads RX status through IEEE80211_SKB_RXCB(skb), which aliases the same skb->cb storage that ieee80211_rx_mesh_data() reuses as IEEE80211_TX_INFO. In the unicast forward path, mesh_data does: info = IEEE80211_SKB_CB(fwd_skb); memset(info, 0, sizeof(*info)); on the same skb the caller still names via rx->skb, then either queues the skb for TX (success) or kfree_skb()'s it (no-route) before returning RX_QUEUED. The caller's RX_QUEUED arm then calls sta_stats_encode_rate(status) on memory that is either zeroed (success path) or freed (no-route path). The latter is KASAN slab-use-after-free in ieee80211_prepare_and_rx_handle. Fix by encoding the rate from status before invoking ieee80211_rx_mesh_data(), so the RX_QUEUED arm consumes a value captured while status was still backed by valid memory.
References
Impacted products
Vendor Product Version
Linux Linux Version: 3468e1e0c639032a603450f0830ccabfa76f5806
Version: 3468e1e0c639032a603450f0830ccabfa76f5806
Version: 3468e1e0c639032a603450f0830ccabfa76f5806
Version: 3468e1e0c639032a603450f0830ccabfa76f5806
Version: 3468e1e0c639032a603450f0830ccabfa76f5806
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