{"cve":"CVE-2023-53583","nvd":{"published":"2025-10-04T16:15:54.090","modified":"2026-06-17T06:45:39.267","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: RISC-V: Remove PERF_HES_STOPPED flag checking in riscv_pmu_start()\n\nSince commit 096b52fd2bb4 (\"perf: RISC-V: throttle perf events\") the\nperf_sample_event_took() function was added to report time spent in\noverflow interrupts. If the interrupt takes too long, the perf framework\nwill lower the sysctl_perf_event_sample_rate and max_samples_per_tick.\nWhen hwc->interrupts is larger than max_samples_per_tick, the\nhwc->interrupts will be set to MAX_INTERRUPTS, and events will be\nthrottled within the __perf_event_account_interrupt() function.\n\nHowever, the RISC-V PMU driver doesn't call riscv_pmu_stop() to update the\nPERF_HES_STOPPED flag after perf_event_overflow() in pmu_sbi_ovf_handler()\nfunction to avoid throttling. When the perf framework unthrottled the event\nin the timer interrupt handler, it triggers riscv_pmu_start() function\nand causes a WARN_ON_ONCE() warning, as shown below:\n\n ------------[ cut here ]------------\n WARNING: CPU: 0 PID: 240 at drivers/perf/riscv_pmu.c:184 riscv_pmu_start+0x7c/0x8e\n Modules linked in:\n CPU: 0 PID: 240 Comm: ls Not tainted 6.4-rc4-g19d0788e9ef2 #1\n Hardware name: SiFive (DT)\n epc : riscv_pmu_start+0x7c/0x8e\n  ra : riscv_pmu_start+0x28/0x8e\n epc : ffffffff80aef864 ra : ffffffff80aef810 sp : ffff8f80004db6f0\n  gp : ffffffff81c83750 tp : ffffaf80069f9bc0 t0 : ffff8f80004db6c0\n  t1 : 0000000000000000 t2 : 000000000000001f s0 : ffff8f80004db720\n  s1 : ffffaf8008ca1068 a0 : 0000ffffffffffff a1 : 0000000000000000\n  a2 : 0000000000000001 a3 : 0000000000000870 a4 : 0000000000000000\n  a5 : 0000000000000000 a6 : 0000000000000840 a7 : 0000000000000030\n  s2 : 0000000000000000 s3 : ffffaf8005165800 s4 : ffffaf800424da00\n  s5 : ffffffffffffffff s6 : ffffffff81cc7590 s7 : 0000000000000000\n  s8 : 0000000000000006 s9 : 0000000000000001 s10: ffffaf807efbc340\n  s11: ffffaf807efbbf00 t3 : ffffaf8006a16028 t4 : 00000000dbfbb796\n  t5 : 0000000700000000 t6 : ffffaf8005269870\n status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003\n [<ffffffff80aef864>] riscv_pmu_start+0x7c/0x8e\n [<ffffffff80185b56>] perf_adjust_freq_unthr_context+0x15e/0x174\n [<ffffffff80188642>] perf_event_task_tick+0x88/0x9c\n [<ffffffff800626a8>] scheduler_tick+0xfe/0x27c\n [<ffffffff800b5640>] update_process_times+0x9a/0xba\n [<ffffffff800c5bd4>] tick_sched_handle+0x32/0x66\n [<ffffffff800c5e0c>] tick_sched_timer+0x64/0xb0\n [<ffffffff800b5e50>] __hrtimer_run_queues+0x156/0x2f4\n [<ffffffff800b6bdc>] hrtimer_interrupt+0xe2/0x1fe\n [<ffffffff80acc9e8>] riscv_timer_interrupt+0x38/0x42\n [<ffffffff80090a16>] handle_percpu_devid_irq+0x90/0x1d2\n [<ffffffff8008a9f4>] generic_handle_domain_irq+0x28/0x36\n\nAfter referring other PMU drivers like Arm, Loongarch, Csky, and Mips,\nthey don't call *_pmu_stop() to update with PERF_HES_STOPPED flag\nafter perf_event_overflow() function nor do they add PERF_HES_STOPPED\nflag checking in *_pmu_start() which don't cause this warning.\n\nThus, it's recommended to remove this unnecessary check in\nriscv_pmu_start() function to prevent this warning.","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/66843b14fb71825fdd73ab12f6594f2243b402be","https://git.kernel.org/stable/c/8270d539a943d00cf6a094da0073e2b5972b641d","https://git.kernel.org/stable/c/aeb62beaf9cbd0a72e7f97c9af6d3e7f76ce2946"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:11:26.888974865+00:00"},"epss":{"cve":"CVE-2023-53583","score":0.00157,"percentile":0.04856,"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."]}