Description
In the Linux kernel, the following vulnerability has been resolved:

drivers: perf: Do not broadcast to other cpus when starting a counter

This command:

$ perf record -e cycles:k -e instructions:k -c 10000 -m 64M dd if=/dev/zero of=/dev/null count=1000

gives rise to this kernel warning:

[ 444.364395] WARNING: CPU: 0 PID: 104 at kernel/smp.c:775 smp_call_function_many_cond+0x42c/0x436
[ 444.364515] Modules linked in:
[ 444.364657] CPU: 0 PID: 104 Comm: perf-exec Not tainted 6.6.0-rc6-00051-g391df82e8ec3-dirty #73
[ 444.364771] Hardware name: riscv-virtio,qemu (DT)
[ 444.364868] epc : smp_call_function_many_cond+0x42c/0x436
[ 444.364917] ra : on_each_cpu_cond_mask+0x20/0x32
[ 444.364948] epc : ffffffff8009f9e0 ra : ffffffff8009fa5a sp : ff20000000003800
[ 444.364966] gp : ffffffff81500aa0 tp : ff60000002b83000 t0 : ff200000000038c0
[ 444.364982] t1 : ffffffff815021f0 t2 : 000000000000001f s0 : ff200000000038b0
[ 444.364998] s1 : ff60000002c54d98 a0 : ff60000002a73940 a1 : 0000000000000000
[ 444.365013] a2 : 0000000000000000 a3 : 0000000000000003 a4 : 0000000000000100
[ 444.365029] a5 : 0000000000010100 a6 : 0000000000f00000 a7 : 0000000000000000
[ 444.365044] s2 : 0000000000000000 s3 : ffffffffffffffff s4 : ff60000002c54d98
[ 444.365060] s5 : ffffffff81539610 s6 : ffffffff80c20c48 s7 : 0000000000000000
[ 444.365075] s8 : 0000000000000000 s9 : 0000000000000001 s10: 0000000000000001
[ 444.365090] s11: ffffffff80099394 t3 : 0000000000000003 t4 : 00000000eac0c6e6
[ 444.365104] t5 : 0000000400000000 t6 : ff60000002e010d0
[ 444.365120] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003
[ 444.365226] [<ffffffff8009f9e0>] smp_call_function_many_cond+0x42c/0x436
[ 444.365295] [<ffffffff8009fa5a>] on_each_cpu_cond_mask+0x20/0x32
[ 444.365311] [<ffffffff806e90dc>] pmu_sbi_ctr_start+0x7a/0xaa
[ 444.365327] [<ffffffff806e880c>] riscv_pmu_start+0x48/0x66
[ 444.365339] [<ffffffff8012111a>] perf_adjust_freq_unthr_context+0x196/0x1ac
[ 444.365356] [<ffffffff801237aa>] perf_event_task_tick+0x78/0x8c
[ 444.365368] [<ffffffff8003faf4>] scheduler_tick+0xe6/0x25e
[ 444.365383] [<ffffffff8008a042>] update_process_times+0x80/0x96
[ 444.365398] [<ffffffff800991ec>] tick_sched_handle+0x26/0x52
[ 444.365410] [<ffffffff800993e4>] tick_sched_timer+0x50/0x98
[ 444.365422] [<ffffffff8008a6aa>] __hrtimer_run_queues+0x126/0x18a
[ 444.365433] [<ffffffff8008b350>] hrtimer_interrupt+0xce/0x1da
[ 444.365444] [<ffffffff806cdc60>] riscv_timer_interrupt+0x30/0x3a
[ 444.365457] [<ffffffff8006afa6>] handle_percpu_devid_irq+0x80/0x114
[ 444.365470] [<ffffffff80065b82>] generic_handle_domain_irq+0x1c/0x2a
[ 444.365483] [<ffffffff8045faec>] riscv_intc_irq+0x2e/0x46
[ 444.365497] [<ffffffff808a9c62>] handle_riscv_irq+0x4a/0x74
[ 444.365521] [<ffffffff808aa760>] do_irq+0x7c/0x7e
[ 444.365796] ---[ end trace 0000000000000000 ]---

That's because the fix in commit 3fec323339a4 ("drivers: perf: Fix panic
in riscv SBI mmap support") was wrong since there is no need to broadcast
to other cpus when starting a counter, that's only needed in mmap when
the counters could have already been started on other cpus, so simply
remove this broadcast.
Published: 2024-05-21
Score: 3.3 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

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History

Fri, 26 Sep 2025 17:00:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:linux:linux_kernel:6.6.1:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.6:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.6:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.6:rc7:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Wed, 11 Sep 2024 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T07:44:05.060Z

Reserved: 2024-05-21T15:19:24.253Z

Link: CVE-2023-52839

cve-icon Vulnrichment

Updated: 2024-08-02T23:11:35.924Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-21T16:15:21.310

Modified: 2025-09-26T16:46:04.037

Link: CVE-2023-52839

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2023-52839 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T22:15:54Z

Weaknesses