ice: fix double-free of tx_buf skb

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Summary

CVECVE-2026-53009
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-24 17:17:12 UTC
Updated2026-06-24 17:17:12 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d76a60ba7afb89523c88cf2ed3a044ce4180289e 4c08fc2119ef0281cfa2cee007acf0a251be55f2 git Not specified
CNA Linux Linux affected d76a60ba7afb89523c88cf2ed3a044ce4180289e 1a303baa715e6b78d6a406aaf335f87ff35acfcd git Not specified
CNA Linux Linux affected 4.17 Not specified
CNA Linux Linux unaffected 4.17 semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1a303baa715e6b78d6a406aaf335f87ff35acfcd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4c08fc2119ef0281cfa2cee007acf0a251be55f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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