CVE-2026-74286

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux76c8764ef36a5d37ea2e551bda28ac7f028383ba < 56b4ad500fd1282ef04db3c4beae5b54ab093a53affected
LinuxLinux76c8764ef36a5d37ea2e551bda28ac7f028383ba < 51a1d9836acc76a1bd16170b2f4b35f11036593faffected
LinuxLinux76c8764ef36a5d37ea2e551bda28ac7f028383ba < 67e4b283de36d9eebf95acdea5d6674b6ef4b2f4affected
LinuxLinux76c8764ef36a5d37ea2e551bda28ac7f028383ba < 24041543da8cd84eb5d8ae738c534372fff54820affected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References