CVE-2026-23332 (GCVE-0-2026-23332)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-03-25 10:27
VLAI?
Title
cpufreq: intel_pstate: Fix crash during turbo disable
Summary
In the Linux kernel, the following vulnerability has been resolved: cpufreq: intel_pstate: Fix crash during turbo disable When the system is booted with kernel command line argument "nosmt" or "maxcpus" to limit the number of CPUs, disabling turbo via: echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo results in a crash: PF: supervisor read access in kernel mode PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP PTI ... RIP: 0010:store_no_turbo+0x100/0x1f0 ... This occurs because for_each_possible_cpu() returns CPUs even if they are not online. For those CPUs, all_cpu_data[] will be NULL. Since commit 973207ae3d7c ("cpufreq: intel_pstate: Rearrange max frequency updates handling code"), all_cpu_data[] is dereferenced even for CPUs which are not online, causing the NULL pointer dereference. To fix that, pass CPU number to intel_pstate_update_max_freq() and use all_cpu_data[] for those CPUs for which there is a valid cpufreq policy.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < a1850e2aef4d15405e7ff53fd51c4b3124d46182 (git)
Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < d20d48916ce8531b157c2edeba76d69af2974270 (git)
Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < 6b050482ec40569429d963ac52afa878691b04c9 (git)
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    Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.18.17 , ≤ 6.18.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc2 , ≤ * (original_commit_for_fix)
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          "programFiles": [
            "drivers/cpufreq/intel_pstate.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: intel_pstate: Fix crash during turbo disable\n\nWhen the system is booted with kernel command line argument \"nosmt\" or\n\"maxcpus\" to limit the number of CPUs, disabling turbo via:\n\n echo 1 \u003e /sys/devices/system/cpu/intel_pstate/no_turbo\n\nresults in a crash:\n\n PF: supervisor read access in kernel mode\n PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP PTI\n ...\n RIP: 0010:store_no_turbo+0x100/0x1f0\n ...\n\nThis occurs because for_each_possible_cpu() returns CPUs even if they\nare not online. For those CPUs, all_cpu_data[] will be NULL. Since\ncommit 973207ae3d7c (\"cpufreq: intel_pstate: Rearrange max frequency\nupdates handling code\"), all_cpu_data[] is dereferenced even for CPUs\nwhich are not online, causing the NULL pointer dereference.\n\nTo fix that, pass CPU number to intel_pstate_update_max_freq() and use\nall_cpu_data[] for those CPUs for which there is a valid cpufreq policy."
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        "dateUpdated": "2026-03-25T10:27:23.193Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/6b050482ec40569429d963ac52afa878691b04c9"
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      "title": "cpufreq: intel_pstate: Fix crash during turbo disable",
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    "cveId": "CVE-2026-23332",
    "datePublished": "2026-03-25T10:27:23.193Z",
    "dateReserved": "2026-01-13T15:37:45.997Z",
    "dateUpdated": "2026-03-25T10:27:23.193Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23332\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-03-25T11:16:30.647\",\"lastModified\":\"2026-03-25T15:41:33.977\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncpufreq: intel_pstate: Fix crash during turbo disable\\n\\nWhen the system is booted with kernel command line argument \\\"nosmt\\\" or\\n\\\"maxcpus\\\" to limit the number of CPUs, disabling turbo via:\\n\\n echo 1 \u003e /sys/devices/system/cpu/intel_pstate/no_turbo\\n\\nresults in a crash:\\n\\n PF: supervisor read access in kernel mode\\n PF: error_code(0x0000) - not-present page\\n PGD 0 P4D 0\\n Oops: Oops: 0000 [#1] SMP PTI\\n ...\\n RIP: 0010:store_no_turbo+0x100/0x1f0\\n ...\\n\\nThis occurs because for_each_possible_cpu() returns CPUs even if they\\nare not online. For those CPUs, all_cpu_data[] will be NULL. Since\\ncommit 973207ae3d7c (\\\"cpufreq: intel_pstate: Rearrange max frequency\\nupdates handling code\\\"), all_cpu_data[] is dereferenced even for CPUs\\nwhich are not online, causing the NULL pointer dereference.\\n\\nTo fix that, pass CPU number to intel_pstate_update_max_freq() and use\\nall_cpu_data[] for those CPUs for which there is a valid cpufreq policy.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6b050482ec40569429d963ac52afa878691b04c9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a1850e2aef4d15405e7ff53fd51c4b3124d46182\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d20d48916ce8531b157c2edeba76d69af2974270\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.