Description
In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
linux linux_kernel
4.10 to 5.6affected
References
- http://www.openwall.com/lists/oss-security/2020/01/30/4 ↗
- https://lore.kernel.org/lkml/1580407316-11391-1-git-send-email-pbonzini%40redhat.com/ ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=1792167 ↗
- https://git.kernel.org/linus/8c6de56a42e0c657955e12b882a81ef07d1d073e ↗
- https://git.kernel.org/linus/1eff70a9abd46f175defafd29bc17ad456f398a7 ↗
- https://git.kernel.org/linus/917248144db5d7320655dbb41d3af0b8a0f3d589 ↗
- https://git.kernel.org/linus/b043138246a41064527cf019a3d51d9f015e9796 ↗
- https://git.kernel.org/linus/a6bd811f1209fe1c64c9f6fd578101d6436c6b6e ↗
- https://security.netapp.com/advisory/ntap-20200313-0003/ ↗
- https://usn.ubuntu.com/4300-1/ ↗
- https://usn.ubuntu.com/4301-1/ ↗
- http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html ↗
- https://www.debian.org/security/2020/dsa-4699 ↗