CVE-2026-74474
Description
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.
How to fix
- Linux Linux371425d4be7795e9158388af9eee0201e6047410, bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4, 6146901881f09ef063eb34ad389f63231f8486f5, 94dee751aad627b3645d424b5d0c736d394573e9, 7076a34b6e33315dc160b4612bfea1c597495585, b9553558b48db54ac9273e6b98d7263ef5c1a329 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 371425d4be7795e9158388af9eee0201e6047410, e4f67addf158f98f8197e08974966b18480dc751 ≤ v < bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4, e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 6146901881f09ef063eb34ad389f63231f8486f5, e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 94dee751aad627b3645d424b5d0c736d394573e9, e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 7076a34b6e33315dc160b4612bfea1c597495585, e4f67addf158f98f8197e08974966b18480dc751 ≤ v < b9553558b48db54ac9273e6b98d7263ef5c1a329, 3.8 | 371425d4be7795e9158388af9eee0201e6047410, bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4, 6146901881f09ef063eb34ad389f63231f8486f5, 94dee751aad627b3645d424b5d0c736d394573e9, 7076a34b6e33315dc160b4612bfea1c597495585, b9553558b48db54ac9273e6b98d7263ef5c1a329 |
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