{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-53583", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53583", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2025-10-04T15:43:59.154Z", "updatedAt": "2026-05-11T19:47:52.528Z", "importedAt": "2026-10-24T01:57:03.413Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "perf: RISC-V: Remove PERF_HES_STOPPED flag checking in riscv_pmu_start()", "summary": "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 [] riscv_pmu_start+0x7c/0x8e\n [] perf_adjust_freq_unthr_context+0x15e/0x174\n [] perf_event_task_tick+0x88/0x9c\n [] scheduler_tick+0xfe/0x27c\n [] update_process_times+0x9a/0xba\n [] tick_sched_handle+0x32/0x66\n [] tick_sched_timer+0x64/0xb0\n [] __hrtimer_run_queues+0x156/0x2f4\n [] hrtimer_interrupt+0xe2/0x1fe\n [] riscv_timer_interrupt+0x38/0x42\n [] handle_percpu_devid_irq+0x90/0x1d2\n [] 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.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "096b52fd2bb4996fd68d22b3b7ad21a1296db9d3", "status": "affected", "versionType": "git", "lessThan": "aeb62beaf9cbd0a72e7f97c9af6d3e7f76ce2946" }, { "version": "096b52fd2bb4996fd68d22b3b7ad21a1296db9d3", "status": "affected", "versionType": "git", "lessThan": "8270d539a943d00cf6a094da0073e2b5972b641d" }, { "version": "096b52fd2bb4996fd68d22b3b7ad21a1296db9d3", "status": "affected", "versionType": "git", "lessThan": "66843b14fb71825fdd73ab12f6594f2243b402be" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.1", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.1" }, { "version": "6.1.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.4.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.4.*" }, { "version": "6.5", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }