CVE-2023-3640

x86/mm: a per-cpu entry area leak was identified through the init_cea_offsets function when prefetchnta and prefetcht2 instructions being used for the per-cpu entry area mapping to the user space

References

Notes

 bwh> From the description on RHBZ, this seems like the unfixable residual
 bwh> effect of Meltdown and not a new issue.  There's no claim that kernel
 bwh> memory outside of the entry area can be read.

Bugs

Status

Branch Status
4.19-buster-security ignored "Unfixable CPU issue"
4.19-upstream-stable ignored "Unfixable CPU issue"
5.10-bullseye-security ignored "Unfixable CPU issue"
5.10-upstream-stable ignored "Unfixable CPU issue"
6.1-bookworm-security ignored "Unfixable CPU issue"
6.1-upstream-stable ignored "Unfixable CPU issue"
6.6-upstream-stable unknown
6.8-upstream-stable unknown
sid ignored "Unfixable CPU issue"
upstream ignored "Unfixable CPU issue"