SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:1124-1)

This update for xen fixes the following issues : Security issues fixed : CVE-2020-11742: Bad continuation handling in GNTTABOPcopy bsc1169392. CVE-2020-11740, CVE-2020-11741: xen: XSA-313 multiple xenoprof issues bsc1168140. CVE-2020-11739: Missing memory barriers in read-write unlock paths...

Xen Arm-Based CPU Speculation past the ERET Instruction (XSA-312)

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a speculative memory accesses vulnerability. Some CPUs can speculate past an ERET instruction and potentially perform speculative accesses to memory before processing the exception return...

arm: a CPU may speculate past the ERET instruction

ISSUE DESCRIPTION Some CPUs can speculate past an ERET instruction and potentially perform speculative accesses to memory before processing the exception return. Since the register state is often controlled by lower privilege level i.e guest kernel/userspace at the point of the ERET, this could...