Critical severity · published Aug 15, 2026
CVE-2026-74474
vxlan: use pskb_network_may_pull() for transmit path header pulls
9.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
e4f67addf158f98f8197e08974966b18480dc751 before 371425d4be7795e9158388af9eee0201e6047410; e4f67addf158f98f8197e08974966b18480dc751 before bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4; e4f67addf158f98f8197e08974966b18480dc751 before 6146901881f09ef063eb34ad389f63231f8486f5; e4f67addf158f98f8197e08974966b18480dc751 before 94dee751aad627b3645d424b5d0c736d394573e9; e4f67addf158f98f8197e08974966b18480dc751 before 7076a34b6e33315dc160b4612bfea1c597495585; e4f67addf158f98f8197e08974966b18480dc751 before b9553558b48db54ac9273e6b98d7263ef5c1a329; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74474
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-74474
git.kernel.org
https://git.kernel.org/stable/c/371425d4be7795e9158388af9eee0201e6047410
git.kernel.org
https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5
git.kernel.org
https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585
git.kernel.org
https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9
git.kernel.org
https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329
git.kernel.org
https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4
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