CVE-2026-53009
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk3th percentile - higher than 3% of all known CVEs
Summary
A double-free vulnerability was found in the Intel ice network driver's ice_xmit_frame_ring() function. When ice_tso() or ice_tx_csum() fails, the skb is freed but the tx_buf pointer remains set, leading to a second free during transmit queue cleanup.
Risk Assessment
Double-free memory corruption can cause system crashes or potentially be exploited by a local attacker for privilege escalation or arbitrary code execution.
Recommendation
Apply the Linux kernel patch that resets the tx_buf type to ICE_TX_BUF_EMPTY in the error path. Update your system to a kernel version that includes this fix.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: ice: fix double-free of tx_buf skb If ice_tso() or ice_tx_csum() fail, the error path in ice_xmit_frame_ring() frees the skb, but the 'first' tx_buf still points to it and is marked as valid (ICE_TX_BUF_SKB). 'next_to_use' remains unchanged, so the potential problem will likely fix itself when the next packet is transmitted and the tx_buf gets overwritten. But if there is no next packet and the interface is brought down instead, ice_clean_tx_ring() -> ice_unmap_and_free_tx_buf() will find the tx_buf and free the skb for the second time. The fix is to reset the tx_buf type to ICE_TX_BUF_EMPTY in the error path, so that ice_unmap_and_free_tx_buf(). Move the initialization of 'first' up, to ensure it's already valid in case we hit the linearization error path. The bug was spotted by AI while I had it looking for something else. It also proposed an initial version of the patch. I reproduced the bug and tested the fix by adding code to inject failures, on a build with KASAN. I looked for similar bugs in related Intel drivers and did not find any.