CVE-2026-74286 net: pfcp: allocate per-cpu tstats for PFCP netdevs
A null pointer dereference in the Linux kernel PFCP driver allows local attackers to cause a denial of service by creating a PFCP device.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74286?
CVE-2026-74286 is a vulnerability in Linux, published on 15 Aug 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: pfcp: allocate per-cpu tstats for PFCP netdevs
PFCP uses dev_get_tstats64() as its ndo_get_stats64 callback, but pfcp_link_setup() does not request NETDEV_PCPU_STAT_TSTATS. The net core therefore leaves dev->tstats NULL for PFCP devices.
Creating a PFCP rtnetlink device can immediately ask the new netdev for stats while building the RTM_NEWLINK notification. That reaches dev_get_tstats64() and dereferences the NULL dev->tstats pointer.
Set pcpu_stat_type to NETDEV_PCPU_STAT_TSTATS during PFCP link setup so the net core allocates the storage expected by dev_get_tstats64().
Which versions are affected by CVE-2026-74286?
How do I fix CVE-2026-74286?
Apply the vendor's patch.
Is CVE-2026-74286 being exploited?
There is no known exploitation of CVE-2026-74286 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74286, DEBIAN-CVE-2026-74286, GHSA-m87g-crrv-q9fh, UBUNTU-CVE-2026-74286.