In the Linux kernel, the following vulnerability has been resolved:
perf/x86/amd/core: Always clear status for idx
The variable 'status' (which contains the unhandled overflow bits) is not being properly masked in some cases, displaying the following warning:
WARNING: CPU: 156 PID: 475601 at arch/x86/events/amd/core.c:972 amd_pmu_v2_handle_irq+0x216/0x270
This seems to be happening because the loop is being continued before the status bit being unset, in case x86_perf_event_set_period() returns 0. This is also causing an inconsistency because the "handled" counter is incremented, but the status bit is not cleaned.
Move the bit cleaning together above, together when the "handled" counter is incremented.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perfUpgrade kernel-libbpf-staticUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-6.1.23-36.46Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernel-libbpfUpgrade kernel-develUpgrade python3-perf-debuginfoUpgrade kernelUpgrade python3-perfUpgrade perf-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-headers | Jun 24, 2025 | May 2, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 2, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernelUpgrade python3-perf | Sep 25, 2025 | Sep 15, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 2, 2025 |
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