# CVE-2026-74474

## Summary

- **CVE ID:** CVE-2026-74474
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Aug 15, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- Linux — Linux (e4f67addf158f98f8197e08974966b18480dc751)
- Linux — Linux (3.8)
- Linux — Linux (0)
- Linux — Linux (6.18.44)
- Linux — Linux (7.1.8)
- Linux — Linux (7.2-rc6)
- Linux — Linux (7.2)
- Linux — Linux (6.6.153)
- Linux — Linux (6.12.105)
- Linux — Linux (6.1.188)

## References

- [CNA](https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9)
- [CNA](https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585)
- [CNA](https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329)
- [CNA](https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4)
- [CNA](https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5)
- [CNA](https://git.kernel.org/stable/c/371425d4be7795e9158388af9eee0201e6047410)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.49%
- **EPSS Percentile:** 41.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._