Date: Tue, 24 Nov 2020 01:41:13 +1100 From: Andrew Donnellan <ajd@...ux.ibm.com> To: oss-security@...ts.openwall.com, linuxppc-dev <linuxppc-dev@...ts.ozlabs.org> Subject: Re: Linux kernel: powerpc: RTAS calls can be used to compromise kernel integrity On 9/10/20 12:20 pm, Andrew Donnellan wrote: > The Linux kernel for powerpc has an issue with the Run-Time Abstraction > Services (RTAS) interface, allowing root (or CAP_SYS_ADMIN users) in a > VM to overwrite some parts of memory, including kernel memory. > > This issue impacts guests running on top of PowerVM or KVM hypervisors > (pseries platform), and does *not* impact bare-metal machines (powernv > platform). CVE-2020-27777 has been assigned. -- Andrew Donnellan OzLabs, ADL Canberra ajd@...ux.ibm.com IBM Australia Limited
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