{"cve":"CVE-2023-53563","nvd":{"published":"2025-10-04T16:15:51.757","modified":"2026-06-17T06:45:36.800","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: amd-pstate-ut: Fix kernel panic when loading the driver\n\nAfter loading the amd-pstate-ut driver, amd_pstate_ut_check_perf()\nand amd_pstate_ut_check_freq() use cpufreq_cpu_get() to get the policy\nof the CPU and mark it as busy.\n\nIn these functions, cpufreq_cpu_put() should be used to release the\npolicy, but it is not, so any other entity trying to access the policy\nis blocked indefinitely.\n\nOne such scenario is when amd_pstate mode is changed, leading to the\nfollowing splat:\n\n[ 1332.103727] INFO: task bash:2929 blocked for more than 120 seconds.\n[ 1332.110001]       Not tainted 6.5.0-rc2-amd-pstate-ut #5\n[ 1332.115315] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[ 1332.123140] task:bash            state:D stack:0     pid:2929  ppid:2873   flags:0x00004006\n[ 1332.123143] Call Trace:\n[ 1332.123145]  <TASK>\n[ 1332.123148]  __schedule+0x3c1/0x16a0\n[ 1332.123154]  ? _raw_read_lock_irqsave+0x2d/0x70\n[ 1332.123157]  schedule+0x6f/0x110\n[ 1332.123160]  schedule_timeout+0x14f/0x160\n[ 1332.123162]  ? preempt_count_add+0x86/0xd0\n[ 1332.123165]  __wait_for_common+0x92/0x190\n[ 1332.123168]  ? __pfx_schedule_timeout+0x10/0x10\n[ 1332.123170]  wait_for_completion+0x28/0x30\n[ 1332.123173]  cpufreq_policy_put_kobj+0x4d/0x90\n[ 1332.123177]  cpufreq_policy_free+0x157/0x1d0\n[ 1332.123178]  ? preempt_count_add+0x58/0xd0\n[ 1332.123180]  cpufreq_remove_dev+0xb6/0x100\n[ 1332.123182]  subsys_interface_unregister+0x114/0x120\n[ 1332.123185]  ? preempt_count_add+0x58/0xd0\n[ 1332.123187]  ? __pfx_amd_pstate_change_driver_mode+0x10/0x10\n[ 1332.123190]  cpufreq_unregister_driver+0x3b/0xd0\n[ 1332.123192]  amd_pstate_change_driver_mode+0x1e/0x50\n[ 1332.123194]  store_status+0xe9/0x180\n[ 1332.123197]  dev_attr_store+0x1b/0x30\n[ 1332.123199]  sysfs_kf_write+0x42/0x50\n[ 1332.123202]  kernfs_fop_write_iter+0x143/0x1d0\n[ 1332.123204]  vfs_write+0x2df/0x400\n[ 1332.123208]  ksys_write+0x6b/0xf0\n[ 1332.123210]  __x64_sys_write+0x1d/0x30\n[ 1332.123213]  do_syscall_64+0x60/0x90\n[ 1332.123216]  ? fpregs_assert_state_consistent+0x2e/0x50\n[ 1332.123219]  ? exit_to_user_mode_prepare+0x49/0x1a0\n[ 1332.123223]  ? irqentry_exit_to_user_mode+0xd/0x20\n[ 1332.123225]  ? irqentry_exit+0x3f/0x50\n[ 1332.123226]  ? exc_page_fault+0x8e/0x190\n[ 1332.123228]  entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n[ 1332.123232] RIP: 0033:0x7fa74c514a37\n[ 1332.123234] RSP: 002b:00007ffe31dd0788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ 1332.123238] RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 00007fa74c514a37\n[ 1332.123239] RDX: 0000000000000008 RSI: 000055e27c447aa0 RDI: 0000000000000001\n[ 1332.123241] RBP: 000055e27c447aa0 R08: 00007fa74c5d1460 R09: 000000007fffffff\n[ 1332.123242] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008\n[ 1332.123244] R13: 00007fa74c61a780 R14: 00007fa74c616600 R15: 00007fa74c615a00\n[ 1332.123247]  </TASK>\n\nFix this by calling cpufreq_cpu_put() wherever necessary.\n\n[ rjw: Subject and changelog edits ]","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":[],"references":["https://git.kernel.org/stable/c/0f74f12ee042fd72e45f0e8700e063c84ef3883b","https://git.kernel.org/stable/c/60dd283804479c4a52f995b713f448e2cd65b8c8","https://git.kernel.org/stable/c/84857640c67405eed258c461b3ef909002f1e201","https://git.kernel.org/stable/c/fcf78a17bbb94bebaa912f0460a1848f7d374c94"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2023-53563","score":0.00148,"percentile":0.03998,"date":"2026-11-01"},"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."]}