CVE-2026-64035 igc: set tx buffer type for SMD frames
A missing buffer type initialization in the igc network driver can cause incorrect cleanup paths, potentially leading to system instability or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64035?
CVE-2026-64035 is a critical vulnerability in Linux kernel, published on 19 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
igc: set tx buffer type for SMD frames
Sashiko pointed out that igc_fpe_init_smd_frame() initializes igc_tx_buffer fields for an SMD skb, but does not set the buffer type: https://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp
Since igc_tx_buffer entries are reused, a stale XDP or XSK type can remain and make TX completion use the wrong cleanup path.
Set the buffer type to IGC_TX_BUFFER_TYPE_SKB.
Which versions are affected by CVE-2026-64035?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64035?
Apply the vendor's patch.
Is CVE-2026-64035 being exploited?
There is no known exploitation of CVE-2026-64035 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64035, DEBIAN-CVE-2026-64035, GHSA-85cw-fhvw-f94j, UBUNTU-CVE-2026-64035.