{"cve":"CVE-2026-23332","nvd":{"published":"2026-03-25T11:16:30.647","modified":"2026-06-17T10:21:20.670","status":"Analyzed","description":"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 > /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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/6b050482ec40569429d963ac52afa878691b04c9","https://git.kernel.org/stable/c/a1850e2aef4d15405e7ff53fd51c4b3124d46182","https://git.kernel.org/stable/c/d20d48916ce8531b157c2edeba76d69af2974270"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-23332","score":0.00125,"percentile":0.02212,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}