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CVE

CVE-2026-74474

vxlan: use pskb_network_may_pull() for transmit path header pulls
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CVE

CVE-2026-74474

vxlan: use pskb_network_may_pull() for transmit path header pulls

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

vxlan: use pskbnetworkmay_pull() for transmit path header pulls

In vxlanxmit(), arpreduce(), and vxlanmdbentryskbget(), pskbmaypull() 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 skbnetworkoffset(skb)

is ETHHLEN (14 bytes). Using pskbmay_pull(skb, len) only checks len bytes from skb->data

rather than skbnetworkoffset(skb) + len, which can leave part of the network header

in non-linear frags.

Replace these remaining pskbmaypull() calls with pskbnetworkmay_pull() to properly

account for the MAC header offset.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/6146901881f09ef063eb34ad389f63231f8486f5, https://git.kernel.org/stable/c/7076a34b6e33315dc160b4612bfea1c597495585, https://git.kernel.org/stable/c/94dee751aad627b3645d424b5d0c736d394573e9, https://git.kernel.org/stable/c/b9553558b48db54ac9273e6b98d7263ef5c1a329, https://git.kernel.org/stable/c/bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74474.json, https://nvd.nist.gov/vuln/detail/CVE-2026-74474, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00457%
EPSS Percentile
0.37837%
Introduced Version
e4f67addf158f98f8197e08974966b18480dc751,3.8.0,6.7.0,6.13.0,6.19.0,0
Fix Available
b9553558b48db54ac9273e6b98d7263ef5c1a329,6.6.153,6.12.105,6.18.44,7.1.8,6.12.105-1

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