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

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-05-11 22:04
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
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 CPE status
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 , ≤ * (original_commit_for_fix)
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        "id": "CVE-2026-23332",
        "lastModified": "2026-06-17T10:21:20.670",
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                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
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        "vulnStatus": "Analyzed",
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                "value": "CWE-476"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T11:43:28+00:00",
      "cve": "CVE-2026-23332",
      "id": "CVE-2026-23332",
      "initial_release_date": "2026-03-25T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: cpufreq: intel_pstate: Fix crash during turbo disable",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23332.json",
      "version": "3"
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}



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