Vulnerability CVE-2023-52746
Published: 2024-05-21

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

xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()

int type = nla_type(nla);

if (type > XFRMA_MAX) {
return -EOPNOTSUPP;
}

@type is then used as an array index and can be used
as a Spectre v1 gadget.

if (nla_len(nla) < compat_policy[type].len) {

array_index_nospec() can be used to prevent leaking
content of kernel memory to malicious users.

 References:
https://git.kernel.org/stable/c/a893cc644812728e86e9aff517fd5698812ecef0
https://git.kernel.org/stable/c/5dc688fae6b7be9dbbf5304a3d2520d038e06db5
https://git.kernel.org/stable/c/419674224390fca298020fc0751a20812f84b12d
https://git.kernel.org/stable/c/b6ee896385380aa621102e8ea402ba12db1cabff
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