Description · from the CVE record
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
ProductAffectedFixed inSource
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 371425d4be7795e9158388af9eee0201e6047410371425d4be7795e9158388af9eee0201e6047410CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4bb01c51950c3ff3c76acdd54b85ab38ccc2a8bb4CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 6146901881f09ef063eb34ad389f63231f8486f56146901881f09ef063eb34ad389f63231f8486f5CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 94dee751aad627b3645d424b5d0c736d394573e994dee751aad627b3645d424b5d0c736d394573e9CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < 7076a34b6e33315dc160b4612bfea1c5974955857076a34b6e33315dc160b4612bfea1c597495585CNA
Linuxe4f67addf158f98f8197e08974966b18480dc751 – < b9553558b48db54ac9273e6b98d7263ef5c1a329b9553558b48db54ac9273e6b98d7263ef5c1a329CNA
Linux3.8–CNA
Scores by source
Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total
by Kastro