CVE-2025-71119 (GCVE-0-2025-71119)

Vulnerability from cvelistv5 – Published: 2026-01-14 15:06 – Updated: 2026-05-23 16:03
VLAI
Title
powerpc/kexec: Enable SMT before waking offline CPUs
Summary
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 482fa21635c8832db022cd2d649db26b8e6170ac , < 7cccd82a0e4aad192fd74fc60e61ed9aed5857a3 (git)
Affected: 38253464bc821d6de6bba81bb1412ebb36f6cbd1 , < d790ef0c4819424ee0c2f448c0a8154c5ca369d1 (git)
Affected: 38253464bc821d6de6bba81bb1412ebb36f6cbd1 , < f0c0a681ffb77b8c5290c88c02d968199663939b (git)
Affected: 38253464bc821d6de6bba81bb1412ebb36f6cbd1 , < 0d5c9e901ad40bd39b38e119c0454b52d7663930 (git)
Affected: 38253464bc821d6de6bba81bb1412ebb36f6cbd1 , < c2296a1e42418556efbeb5636c4fa6aa6106713a (git)
Affected: 15141adf85b14a7cff7abba1cb983f0bf17e3b36 (git)
Affected: 6.1.72 , < 6.1.160 (semver)
Affected: 6.5.12 , < 6.6 (semver)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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    "redhat_vex": {
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      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: powerpc/kexec: Enable SMT before waking offline CPUs",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71119.json",
      "version": "3"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.