{"id":"CVE-2024-26902","title":"perf: RISCV: Fix panic on pmu overflow handler","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: RISCV: Fix panic on pmu overflow handler\n\n(1 << idx) of int is not desired when setting bits in unsigned long\noverflowed_ctrs, use BIT() instead. This panic happe…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77","Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 3ede8e94de6b834b48b0643385e66363e7a04be9","Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6","Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 34b567868777e9fd39ec5333969728a7f0cf179c","Linux 5.18"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T15:48:03.217895Z"},"published":"2024-04-17","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:18:01.097Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-26902","references":[{"url":"https://git.kernel.org/stable/c/dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77"},{"url":"https://git.kernel.org/stable/c/3ede8e94de6b834b48b0643385e66363e7a04be9"},{"url":"https://git.kernel.org/stable/c/9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6"},{"url":"https://git.kernel.org/stable/c/34b567868777e9fd39ec5333969728a7f0cf179c"}],"tags":["cve.org"],"epss":0.00238,"epssPercentile":0.14875,"ingestedAt":"2026-11-03T12:44:28.799Z","slug":"CVE-2024-26902","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nperf: RISCV: Fix panic on pmu overflow handler\n\n(1 << idx) of int is not desired when setting bits in unsigned long\noverflowed_ctrs, use BIT() instead. This panic happens when running\n'perf record -e branches' on sophgo sg2042.\n\n[  273.311852] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098\n[  273.320851] Oops [#1]\n[  273.323179] Modules linked in:\n[  273.326303] CPU: 0 PID: 1475 Comm: perf Not tainted 6.6.0-rc3+ #9\n[  273.332521] Hardware name: Sophgo Mango (DT)\n[  273.336878] epc : riscv_pmu_ctr_get_width_mask+0x8/0x62\n[  273.342291]  ra : pmu_sbi_ovf_handler+0x2e0/0x34e\n[  273.347091] epc : ffffffff80aecd98 ra : ffffffff80aee056 sp : fffffff6e36928b0\n[  273.354454]  gp : ffffffff821f82d0 tp : ffffffd90c353200 t0 : 0000002ade4f9978\n[  273.361815]  t1 : 0000000000504d55 t2 : ffffffff8016cd8c s0 : fffffff6e3692a70\n[  273.369180]  s1 : 0000000000000020 a0 : 0000000000000000 a1 : 00001a8e81800000\n[  273.376540]  a2 : 0000003c00070198 a3 : 0000003c00db75a4 a4 : 0000000000000015\n[  273.383901]  a5 : ffffffd7ff8804b0 a6 : 0000000000000015 a7 : 000000000000002a\n[  273.391327]  s2 : 000000000000ffff s3 : 0000000000000000 s4 : ffffffd7ff8803b0\n[  273.398773]  s5 : 0000000000504d55 s6 : ffffffd905069800 s7 : ffffffff821fe210\n[  273.406139]  s8 : 000000007fffffff s9 : ffffffd7ff8803b0 s10: ffffffd903f29098\n[  273.413660]  s11: 0000000080000000 t3 : 0000000000000003 t4 : ffffffff8017a0ca\n[  273.421022]  t5 : ffffffff8023cfc2 t6 : ffffffd9040780e8\n[  273.426437] status: 0000000200000100 badaddr: 0000000000000098 cause: 000000000000000d\n[  273.434512] [<ffffffff80aecd98>] riscv_pmu_ctr_get_width_mask+0x8/0x62\n[  273.441169] [<ffffffff80076bd8>] handle_percpu_devid_irq+0x98/0x1ee\n[  273.447562] [<ffffffff80071158>] generic_handle_domain_irq+0x28/0x36\n[  273.454151] [<ffffffff8047a99a>] riscv_intc_irq+0x36/0x4e\n[  273.459659] [<ffffffff80c944de>] handle_riscv_irq+0x4a/0x74\n[  273.465442] [<ffffffff80c94c48>] do_irq+0x62/0x92\n[  273.470360] Code: 0420 60a2 6402 5529 0141 8082 0013 0000 0013 0000 (6d5c) b783\n[  273.477921] ---[ end trace 0000000000000000 ]---\n[  273.482630] Kernel panic - not syncing: Fatal exception in interrupt\n\n## Affected\n\n- `Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < dbf3b0ed79abeb552df4f0d8a6d84cee48b5ee77`\n- `Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 3ede8e94de6b834b48b0643385e66363e7a04be9`\n- `Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6`\n- `Linux >= 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 < 34b567868777e9fd39ec5333969728a7f0cf179c`\n- `Linux 5.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}