Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d76a60ba7afb89523c88cf2ed3a044ce4180289e before 359906450690a1d70545220bde82ba74f3fd80f8; affected d76a60ba7afb89523c88cf2ed3a044ce4180289e before eb6cf492ae991e40e1e5b2d3f32ec06e9cc678db; affected d76a60ba7afb89523c88cf2ed3a044ce4180289e before 910e498613d5bf4cbe5f298c2613666c38679fab; affected d76a60ba7afb89523c88cf2ed3a044ce4180289e before 4c08fc2119ef0281cfa2cee007acf0a251be55f2; affected d76a60ba7afb89523c88cf2ed3a044ce4180289e before 1a303baa715e6b78d6a406aaf335f87ff35acfcd |
| Linux / Linux | affected 4.17; unaffected 0 before 4.17; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/359906450690a1d70545220bde82ba74f3fd80f8
- https://git.kernel.org/stable/c/eb6cf492ae991e40e1e5b2d3f32ec06e9cc678db
- https://git.kernel.org/stable/c/910e498613d5bf4cbe5f298c2613666c38679fab
- https://git.kernel.org/stable/c/4c08fc2119ef0281cfa2cee007acf0a251be55f2
- https://git.kernel.org/stable/c/1a303baa715e6b78d6a406aaf335f87ff35acfcd
ADP enrichment
A flaw was found in the Linux kernel's ice network driver. An error in the driver's handling of network packet transmission, specifically when ice_tso() or ice_tx_csum() functions fail, can lead to a double-free of a network buffer (skb). This occurs because a transmit buffer (tx_buf) may still point to an already freed buffer. If the network interface is subsequently brought down, this double-free can be triggered, potentially leading to a system crash or denial of service (DoS).
- https://access.redhat.com/security/cve/CVE-2026-53009
- https://bugzilla.redhat.com/show_bug.cgi?id=2492390
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53009.json
- https://access.redhat.com/errata/RHSA-2026:42919
- https://access.redhat.com/errata/RHSA-2026:65712
- https://access.redhat.com/errata/RHSA-2026:54246
- https://access.redhat.com/errata/RHSA-2026:65711
- https://access.redhat.com/errata/RHSA-2026:54247
No English description supplied.
No references supplied.