Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: powerpc/kexec: Enable SMT before waking offline CPUs If SMT is disabled or a partial SMT state is enabled, when a new kernel image is loaded for kexec, on reboot the following warning is observed: kexec: Waking offline cpu 228. WARNING: CPU: 0 PID: 9062 at arch/powerpc/kexec/core_64.c:223 kexec_prepare_cpus+0x1b0/0x1bc [snip] NIP kexec_prepare_cpus+0x1b0/0x1bc LR kexec_prepare_cpus+0x1a0/0x1bc Call Trace: kexec_prepare_cpus+0x1a0/0x1bc (unreliable) default_machine_kexec+0x160/0x19c machine_kexec+0x80/0x88 kernel_kexec+0xd0/0x118 __do_sys_reboot+0x210/0x2c4 system_call_exception+0x124/0x320 system_call_vectored_common+0x15c/0x2ec This occurs as add_cpu() fails due to cpu_bootable() returning false for CPUs that fail the cpu_smt_thread_allowed() check or non primary threads if SMT is disabled. Fix the issue by enabling SMT and resetting the number of SMT threads to the number of threads per core, before attempting to wake up all present CPUs.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.1.72, < 6.1.160 |
References
- https://git.kernel.org/stable/c/0d5c9e901ad40bd39b38e119c0454b52d7663930Patch
- https://git.kernel.org/stable/c/7cccd82a0e4aad192fd74fc60e61ed9aed5857a3Patch
- https://git.kernel.org/stable/c/c2296a1e42418556efbeb5636c4fa6aa6106713aPatch
- https://git.kernel.org/stable/c/d790ef0c4819424ee0c2f448c0a8154c5ca369d1Patch
- https://git.kernel.org/stable/c/f0c0a681ffb77b8c5290c88c02d968199663939bPatch
FAQ
What is CVE-2025-71119?
CVE-2025-71119 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: powerpc/kexec: Enable SMT before waking offline CPUs If SMT is disabled or a partial SMT state is enabled, when a new kernel image...
How severe is CVE-2025-71119?
CVE-2025-71119 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-71119?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.