CVE-2026-74474

Summary

In the Linux kernel, the following vulnerability has been resolved:

vxlan: use pskb_network_may_pull() for transmit path header pulls

In vxlan_xmit(), arp_reduce(), and vxlan_mdb_entry_skb_get(), pskb_may_pull() was being called to verify the availability of network layer headers (ARP, IPv6/ND, IP/IPv6 MDB keys).

However, during transmit skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, len) only checks len bytes from skb->data rather than skb_network_offset(skb) + len, which can leave part of the network header in non-linear frags.

Replace these remaining pskb_may_pull() calls with pskb_network_may_pull() to properly account for the MAC header offset.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < 371425d4be7795e9158388af9eee0201e6047410affected
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4affected
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < 6146901881f09ef063eb34ad389f63231f8486f5affected
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < 94dee751aad627b3645d424b5d0c736d394573e9affected
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < 7076a34b6e33315dc160b4612bfea1c597495585affected
LinuxLinuxe4f67addf158f98f8197e08974966b18480dc751 < b9553558b48db54ac9273e6b98d7263ef5c1a329affected
LinuxLinux3.8affected
LinuxLinux0 < 3.8unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.153 <= 6.6.*unaffected
LinuxLinux6.12.105 <= 6.12.*unaffected
LinuxLinux6.18.44 <= 6.18.*unaffected
LinuxLinux7.1.8 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References