CVE-2026-53009ice: fix double-free of tx_buf skb
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d76a60ba7afb89523c88cf2ed3a044ce4180289e before 910e498613d5bf4cbe5f298c2613666c38679fab; from d76a60ba7afb89523c88cf2ed3a044ce4180289e before 4c08fc2119ef0281cfa2cee007acf0a251be55f2; from d76a60ba7afb89523c88cf2ed3a044ce4180289e before 1a303baa715e6b78d6a406aaf335f87ff35acfcd | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:6.12.0-211.37.1.el10_2 not affected | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.17 before 7.0.10 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://git.kernel.org/stable/c/910e498613d5bf4cbe5f298c2613666c38679fab
- https://git.kernel.org/stable/c/4c08fc2119ef0281cfa2cee007acf0a251be55f2patch
- https://git.kernel.org/stable/c/1a303baa715e6b78d6a406aaf335f87ff35acfcdpatch
- https://access.redhat.com/errata/RHSA-2026:42919
- https://access.redhat.com/errata/RHSA-2026:54246
- https://access.redhat.com/errata/RHSA-2026:54247
- https://access.redhat.com/errata/RHSA-2026:65711
- https://access.redhat.com/errata/RHSA-2026:65712
- https://access.redhat.com/security/cve/CVE-2026-53009third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492390third-party-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53009.jsonthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.