CVE-2024-26902None▾ Sunlit

perf: RISCV: Fix panic on pmu overflow handler

In the Linux kernel, the following vulnerability has been resolved: perf: RISCV: Fix panic on pmu overflow handler (1 << idx) of int is not desired when setting bits in unsigned long overflowed_ctrs, use BIT() instead. This panic happe…

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Apr 17, 2024

Updated

Oct 30, 2026

CVSS

—

Vendor

Linux

Product

Linux

CWE

—

Depth score

3 · Minimal

EPSS

0.24% · p15

Platforms

—

Source

CVEORG

Vector

—

CISA SSVC

decided 2024-09-10

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 3.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 930 days

Apr 17, 2024Published
Disclosed via CVEORG
Oct 30, 2026Record revised
Last analysed / modified upstream
Nov 3, 2026EPSS first tracked
0.2%

Linux #cve.org

Affected

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 3ede8e94de6b834b48b0643385e66363e7a04be9
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 34b567868777e9fd39ec5333969728a7f0cf179c
Linux 5.18

Full technical detail▾

Overview

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

perf: RISCV: Fix panic on pmu overflow handler

(1 << idx) of int is not desired when setting bits in unsigned long overflowed_ctrs, use BIT() instead. This panic happens when running 'perf record -e branches' on sophgo sg2042.

[ 273.311852] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098 [ 273.320851] Oops [#1] [ 273.323179] Modules linked in: [ 273.326303] CPU: 0 PID: 1475 Comm: perf Not tainted 6.6.0-rc3+ #9 [ 273.332521] Hardware name: Sophgo Mango (DT) [ 273.336878] epc : riscv_pmu_ctr_get_width_mask+0x8/0x62 [ 273.342291] ra : pmu_sbi_ovf_handler+0x2e0/0x34e [ 273.347091] epc : ffffffff80aecd98 ra : ffffffff80aee056 sp : fffffff6e36928b0 [ 273.354454] gp : ffffffff821f82d0 tp : ffffffd90c353200 t0 : 0000002ade4f9978 [ 273.361815] t1 : 0000000000504d55 t2 : ffffffff8016cd8c s0 : fffffff6e3692a70 [ 273.369180] s1 : 0000000000000020 a0 : 0000000000000000 a1 : 00001a8e81800000 [ 273.376540] a2 : 0000003c00070198 a3 : 0000003c00db75a4 a4 : 0000000000000015 [ 273.383901] a5 : ffffffd7ff8804b0 a6 : 0000000000000015 a7 : 000000000000002a [ 273.391327] s2 : 000000000000ffff s3 : 0000000000000000 s4 : ffffffd7ff8803b0 [ 273.398773] s5 : 0000000000504d55 s6 : ffffffd905069800 s7 : ffffffff821fe210 [ 273.406139] s8 : 000000007fffffff s9 : ffffffd7ff8803b0 s10: ffffffd903f29098 [ 273.413660] s11: 0000000080000000 t3 : 0000000000000003 t4 : ffffffff8017a0ca [ 273.421022] t5 : ffffffff8023cfc2 t6 : ffffffd9040780e8 [ 273.426437] status: 0000000200000100 badaddr: 0000000000000098 cause: 000000000000000d [ 273.434512] [<ffffffff80aecd98>] riscv_pmu_ctr_get_width_mask+0x8/0x62 [ 273.441169] [<ffffffff80076bd8>] handle_percpu_devid_irq+0x98/0x1ee [ 273.447562] [<ffffffff80071158>] generic_handle_domain_irq+0x28/0x36 [ 273.454151] [<ffffffff8047a99a>] riscv_intc_irq+0x36/0x4e [ 273.459659] [<ffffffff80c944de>] handle_riscv_irq+0x4a/0x74 [ 273.465442] [<ffffffff80c94c48>] do_irq+0x62/0x92 [ 273.470360] Code: 0420 60a2 6402 5529 0141 8082 0013 0000 0013 0000 (6d5c) b783 [ 273.477921] ---[ end trace 0000000000000000 ]--- [ 273.482630] Kernel panic - not syncing: Fatal exception in interrupt

Affected

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 3ede8e94de6b834b48b0643385e66363e7a04be9
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6
Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 34b567868777e9fd39ec5333969728a7f0cf179c
Linux 5.18

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

perf: RISCV: Fix panic on pmu overflow handler

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

Overview

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

perf: RISCV: Fix panic on pmu overflow handler

(1 << idx) of int is not desired when setting bits in unsigned long overflowed_ctrs, use BIT() instead. This panic happens when running 'perf record -e branches' on sophgo sg2042.

Affected

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 3ede8e94de6b834b48b0643385e66363e7a04be9

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6

Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 34b567868777e9fd39ec5333969728a7f0cf179c

Linux 5.18