Vulnerability-Lookup

GHSA-76W7-8X62-J4QM

Vulnerability from github – Published: 2026-03-25 12:30 – Updated: 2026-03-25 12:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-23332"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-25T11:16:30Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-76w7-8x62-j4qm",
  "modified": "2026-03-25T12:30:23Z",
  "published": "2026-03-25T12:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23332"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6b050482ec40569429d963ac52afa878691b04c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1850e2aef4d15405e7ff53fd51c4b3124d46182"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d20d48916ce8531b157c2edeba76d69af2974270"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-03-25 10:27

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a1850e2aef4d15405…
	https://git.kernel.org/stable/c/d20d48916ce8531b1…
	https://git.kernel.org/stable/c/6b050482ec4056942…

Impacted products

Vendor

Product

Version

Linux

Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < a1850e2aef4d15405e7ff53fd51c4b3124d46182 (git)
Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < d20d48916ce8531b157c2edeba76d69af2974270 (git)
Affected: 973207ae3d7c3c92df4a382df5d7bd695deaa904 , < 6b050482ec40569429d963ac52afa878691b04c9 (git)

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)

Show details on NVD website

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cpufreq/intel_pstate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a1850e2aef4d15405e7ff53fd51c4b3124d46182",
              "status": "affected",
              "version": "973207ae3d7c3c92df4a382df5d7bd695deaa904",
              "versionType": "git"
            },
            {
              "lessThan": "d20d48916ce8531b157c2edeba76d69af2974270",
              "status": "affected",
              "version": "973207ae3d7c3c92df4a382df5d7bd695deaa904",
              "versionType": "git"
            },
            {
              "lessThan": "6b050482ec40569429d963ac52afa878691b04c9",
              "status": "affected",
              "version": "973207ae3d7c3c92df4a382df5d7bd695deaa904",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cpufreq/intel_pstate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.17",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0-rc2",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:27:23.193Z",
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        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d20d48916ce8531b157c2edeba76d69af2974270"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b050482ec40569429d963ac52afa878691b04c9"
        }
      ],
      "title": "cpufreq: intel_pstate: Fix crash during turbo disable",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-76W7-8X62-J4QM

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

Tags

Sightings

Nomenclature