Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3468e1e0c639032a603450f0830ccabfa76f5806 before 5fe97797412aa8bc0184f78379fafb594bcb7f66; affected 3468e1e0c639032a603450f0830ccabfa76f5806 before 0cd37e746e98ab0baa6d8b812955220775b080d6; affected 3468e1e0c639032a603450f0830ccabfa76f5806 before a2650f8461cd8ba287fee2992b36abe733c2bd5e; affected 3468e1e0c639032a603450f0830ccabfa76f5806 before 2fb64f94f9afb774f2fa0c7835727d7a67f89f07; affected 3468e1e0c639032a603450f0830ccabfa76f5806 before d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349 |
| Linux / Linux | affected 6.4; unaffected 0 before 6.4; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5fe97797412aa8bc0184f78379fafb594bcb7f66
- https://git.kernel.org/stable/c/0cd37e746e98ab0baa6d8b812955220775b080d6
- https://git.kernel.org/stable/c/a2650f8461cd8ba287fee2992b36abe733c2bd5e
- https://git.kernel.org/stable/c/2fb64f94f9afb774f2fa0c7835727d7a67f89f07
- https://git.kernel.org/stable/c/d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349
ADP enrichment
No English description supplied.
No references supplied.