Vulnerability details
CVE-2026-74474
vxlan: use pskb_network_may_pull() for transmit path header pulls
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.8Critical | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 3.8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 6146901881f09ef063eb34ad389f63231f8486f5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 371425d4be7795e9158388af9eee0201e6047410 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 7076a34b6e33315dc160b4612bfea1c597495585 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < b9553558b48db54ac9273e6b98d7263ef5c1a329 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | e4f67addf158f98f8197e08974966b18480dc751 ≤ v < 94dee751aad627b3645d424b5d0c736d394573e9 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://git.kernel.org/stable/c/371425d4be7795e9158388af9eee0201e6047410
- https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4
- https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5
- https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9
- https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585
- https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329
Details
- Published
- 2026-08-15
- Last updated
- 2026-10-16
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- —