CVE-2026-98597 net: usb: sr9700: include receive overhead in the length check
A buffer overflow in the Linux kernel sr9700 USB driver allows attackers with physical access to cause memory corruption and potential code execution.
- 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-2026-98597?
CVE-2026-98597 is a memory corruption vulnerability in Linux, published on 18 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: usb: sr9700: include receive overhead in the length check
The receive fixup subtracts the Ethernet CRC from the reported packet length, but compares that payload length against the whole remaining receive buffer. The following copy starts after the three-byte header, and the cursor advance consumes both that header and the four-byte CRC.
Require the payload to fit after SR_RX_OVERHEAD before copying it or advancing to the next packet. The loop already ensures that the remaining buffer is larger than the overhead, so the subtraction is safe.
The issue was found by our static-analysis tool.
Which versions are affected by CVE-2026-98597?
How do I fix CVE-2026-98597?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-98597 being exploited?
There is no known exploitation of CVE-2026-98597 in the wild and no public exploit code.
Sources
Also known as AZL-108696, BELL-CVE-2026-98597, DEBIAN-CVE-2026-98597, GHSA-rp3f-5pmv-m85m, UBUNTU-CVE-2026-98597.