Use of Uninitialized Variable in Linux kernel - CVE-2026-97965
Published: September 28, 2026
Vulnerability identifier: #VU152504
CSH Severity: Low
CVSS v4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97965
CWE-ID: CWE-457
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to disclose uninitialized kernel stack data.
The vulnerability exists due to use of an uninitialized stack variable in vxlan_xmit_one() when transmitting a packet through a VXLAN device using external tunnel information that lacks the IP_TUNNEL_VXLAN_OPT_BIT flag. A local privileged user can transmit such a packet to disclose uninitialized kernel stack data.
The VXLAN device must be configured with both VXLAN_F_COLLECT_METADATA and VXLAN_F_GBP.
Affected software
Linux kernel
How to mitigate CVE-2026-97965
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3