CVE-2024-42230

Source
https://nvd.nist.gov/vuln/detail/CVE-2024-42230
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42230.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-42230
Downstream
Related
Published
2024-07-30T08:15:08Z
Modified
2025-08-09T19:01:28Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

powerpc/pseries: Fix scv instruction crash with kexec

kexec on pseries disables AIL (reloconexc), 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.

References

Affected packages