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

net: ife: require ETH_HLEN to be pullable in ife_decode()

ife decode may return after making only the outer IFE header and
metadata pullable. The caller then passes the decapsulated packet to
eth_type_trans(), which expects the inner Ethernet header to be
accessible from the linear data area.

With a malformed IFE frame, the inner Ethernet header may still be
shorter than ETH_HLEN in the linear area, which can lead to a crash in
the original code.

Fix this by extending the pull check in ife_decode() so that the inner
Ethernet header is also guaranteed to be pullable before returning.

https://git.kernel.org/stable/c/1cb42ec10294a55380e52e674b3df2b962648242

https://git.kernel.org/stable/c/5526d1997aea6c9bd865ca4d4894b52e799d735c

https://git.kernel.org/stable/c/70013f9163bef7fbd9fa62f81cf91b2a7ba66163

https://git.kernel.org/stable/c/8c8818e52fddb247ff3214622401a4de6ff8482e

https://git.kernel.org/stable/c/9406f6012b7343661efb516a11c62d4db2b62f75

https://git.kernel.org/stable/c/9433578bff9c100c466a6354574892e55293cb8f

https://git.kernel.org/stable/c/b69ad768cd4a2ef4e07c18492ae85438ed17c7cb

https://git.kernel.org/stable/c/be272e159dfe1207b67332ad6e17adcf59b4ea4b

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