Integer overflow in Linux kernel - CVE-2026-97984
Published: September 28, 2026
Vulnerability identifier: #VU152489
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97984
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause a kernel warning.
The vulnerability exists due to an integer overflow in IPv6 UDP socket cork handling when sending a large UDP payload with IPv6 path MTU discovery set to IPV6_PMTUDISC_DO or IPV6_PMTUDISC_PROBE over a network device with an unusually large MTU. A local privileged user can configure the device MTU and send a crafted UDP payload to cause a kernel warning.
The issue is limited to UDP sockets; raw IPv6 sockets can send UDP jumbograms.
Affected software
Linux kernel
How to mitigate CVE-2026-97984
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3