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CVE-2026-53009ice: fix double-free of tx_buf skb

Description

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.

Timeline

  1. ID reserved

    By Linux

  2. · 15 days later

    Published

  3. · 4 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-53009, by who scored it
Scored byCVSSScoreVector
LinuxCNA (assigner)3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
redhat-SADPADP (enrichment)3.1High7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.18% · top 92% of all CVEs (12 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • Linux · Linux

    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < aa30e355ee951e804cbc9ff3d5de429ec850eccb
    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < 359906450690a1d70545220bde82ba74f3fd80f8
    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < eb6cf492ae991e40e1e5b2d3f32ec06e9cc678db
    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < 910e498613d5bf4cbe5f298c2613666c38679fab
    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < 4c08fc2119ef0281cfa2cee007acf0a251be55f2
    • affected d76a60ba7afb89523c88cf2ed3a044ce4180289e – < 1a303baa715e6b78d6a406aaf335f87ff35acfcd

  • Linux · Linux

    • affected 4.17
    • unaffected < 4.17
    • unaffected 6.1.191 – ≤ 6.1.*
    • unaffected 6.6.160 – ≤ 6.6.*
    • unaffected 6.12.114 – ≤ 6.12.*
    • unaffected 6.18.57 – ≤ 6.18.*
    • unaffected 7.0.10 – ≤ 7.0.*
    • unaffected 7.1 – ≤ *

References

References14

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .