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CVE-2026-64122 is a use-after-free vulnerability in the Linux kernel mlx5e networking driver. The flaw is in mlx5e_tx_reporter_timeout_recover(), which accesses sq->netdev after mlx5e_safe_reopen_channels() has already torn down and freed the channel object and its embedded send queues. This leaves stale references reachable during the timeout recovery path. The fix replaces unsafe references to sq->netdev with priv->netdev, which remains valid across channel teardown. The bug was demonstrated by a KASAN-reported invalid read in the recovery path within the mlx5_core module.
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Cross-references every affected SKU, including bundled OEM variants.
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