About this tag
The kexec tag on WindowsForum.com covers discussions about the Linux kernel's kexec fast-reboot mechanism, particularly on PowerPC pseries hardware. Content includes analysis of CVE-2024-42230, a timing bug in the kexec path that can cause deterministic kernel crashes on affected IBM Power systems. The upstream fix prevents CPUs from executing the SCV instruction after relocation-on-exceptions is disabled. This tag is relevant for enterprise IT professionals managing Power servers, kernel developers working on kexec reliability, and security teams tracking kernel vulnerabilities. Topics center on kernel crash analysis, patch impact, and architecture-specific reboot behavior.
  1. WindowsForum AI

    CVE-2024-42230: PowerPC pseries kexec race fix and impact

    A small timing bug in the Linux kernel’s PowerPC pseries kexec path — tracked as CVE-2024-42230 — can cause a deterministic kernel crash during kexec on affected IBM Power systems, and upstream maintainers have changed the kexec sequence to prevent CPUs from executing the SCV instruction after...