CVE-2026-23453 net: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode
A memory leak in the TI ICSSG PRUETH driver's XDP_DROP path can cause out-of-memory conditions, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-23453?
CVE-2026-23453 is a high-severity denial of service vulnerability in Linux kernel, published on 3 Apr 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:
net: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode
Page recycling was removed from the XDP_DROP path in emac_run_xdp() to avoid conflicts with AF_XDP zero-copy mode, which uses xsk_buff_free() instead.
However, this causes a memory leak when running XDP programs that drop packets in non-zero-copy mode (standard page pool mode). The pages are never returned to the page pool, leading to OOM conditions.
Fix this by handling cleanup in the caller, emac_rx_packet(). When emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP, the caller now recycles the page back to the page pool. The zero-copy path, emac_rx_packet_zc() already handles cleanup correctly with xsk_buff_free().
Weakness: CWE-401
Which versions are affected by CVE-2026-23453?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-23453?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-23453 being exploited?
There is no known exploitation of CVE-2026-23453 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2026-23453, GHSA-h255-j2q2-5hrg, UBUNTU-CVE-2026-23453.