arp: do not assume dev_hard_header() does not change skb->head
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 98% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
arp: do not assume dev_hard_header() does not change skb->head
arp_create() is the only dev_hard_header() caller
making assumption about skb->head being unchanged.
A recent commit broke this assumption.
Initialize @arp pointer after dev_hard_header() call.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/029935507d0af6553c45380fbf6feecf756fd226https://git.kernel.org/stable/c/393525dee5c39acff8d6705275d7fcaabcfb7f0ahttps://git.kernel.org/stable/c/70bddc16491ef4681f3569b3a2c80309a3edcdd1https://git.kernel.org/stable/c/949647e7771a4a01963fe953a96d81fba7acecf3https://git.kernel.org/stable/c/c92510f5e3f82ba11c95991824a41e59a9c5ed81https://git.kernel.org/stable/c/dd6ccec088adff4bdf33e2b2dd102df20a7128fahttps://git.kernel.org/stable/c/e432dbff342b95fe44645f9a90fcf333c80f4b5e