Vulnerabilities > CVE-2024-42230 - Unspecified vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
HIGH Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Fix scv instruction crash with kexec kexec on pseries disables AIL (reloc_on_exc), required for scv instruction support, before other CPUs have been shut down. This means they can execute scv instructions after AIL is disabled, which causes an interrupt at an unexpected entry location that crashes the kernel. Change the kexec sequence to disable AIL after other CPUs have been brought down. As a refresher, the real-mode scv interrupt vector is 0x17000, and the fixed-location head code probably couldn't easily deal with implementing such high addresses so it was just decided not to support that interrupt at all.
Vulnerable Configurations
References
- https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011
- https://git.kernel.org/stable/c/21a741eb75f80397e5f7d3739e24d7d75e619011
- https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3
- https://git.kernel.org/stable/c/8c6506616386ce37e59b2745fc481c6713fae4f3
- https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407c
- https://git.kernel.org/stable/c/c550679d604798d9fed8a5b2bb5693448a25407c
- https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5
- https://git.kernel.org/stable/c/d10e3c39001e9194b9a1bfd6979bd3fa19dccdc5