Memory leak in Linux kernel - CVE-2026-97959
Published: September 28, 2026
Vulnerability identifier: #VU152516
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97959
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a memory leak.
The vulnerability exists due to a failure to free an emptied route4 bucket in net/sched/cls_route.c route4_change when moving an existing route filter to a different top-level bucket and deleting it. A local user can move an existing route filter to a different top-level bucket and then delete it to cause a memory leak.
The issue requires CONFIG_NET_CLS_ROUTE4, CONFIG_NET_SCH_INGRESS, and CONFIG_NET_CLS_ACT to be enabled.
Affected software
Linux kernel
How to mitigate CVE-2026-97959
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3