CVE-2026-98275 net: ethernet: cortina: Ack RX overrun interrupt correctly
Incorrect interrupt acknowledgment in the Cortina Ethernet driver can cause denial of service by failing to clear RX overrun conditions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98275?
CVE-2026-98275 is a denial of service vulnerability in Linux, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: cortina: Ack RX overrun interrupt correctly
The RX overrun interrupt is reported in interrupt status register 4, but gmac_irq() acknowledges it using the RX descriptor error bit from status register 0. For GMAC0 this writes the GMAC1 overrun bit, while for GMAC1 the shift leaves no bit in the 32-bit register.
Acknowledge the same per-port RX overrun bit that was detected.
Which versions are affected by CVE-2026-98275?
How do I fix CVE-2026-98275?
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-2026-98275 being exploited?
There is no known exploitation of CVE-2026-98275 in the wild and no public exploit code.
Sources
Also known as AZL-106344, BELL-CVE-2026-98275, DEBIAN-CVE-2026-98275, GHSA-pxvw-xq3p-q24h, UBUNTU-CVE-2026-98275.