In the Linux kernel, the following vulnerability has been resolved:
perf/x86/intel: Fix KASAN global-out-of-bounds warning
When running "perf mem record" command on CWF, the below KASAN global-out-of-bounds warning is seen.
================================================================== BUG: KASAN: global-out-of-bounds in cmt_latency_data+0x176/0x1b0 Read of size 4 at addr ffffffffb721d000 by task dtlb/9850
Call Trace:
kasan_report+0xb8/0xf0 cmt_latency_data+0x176/0x1b0 setup_arch_pebs_sample_data+0xf49/0x2560 intel_pmu_drain_arch_pebs+0x577/0xb00 handle_pmi_common+0x6c4/0xc80
The issue is caused by below code in __grt_latency_data(). The code tries to access x86_hybrid_pmu structure which doesn't exist on non-hybrid platform like CWF.
WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big)
So add is_hybrid() check before calling this WARN_ON_ONCE to fix the global-out-of-bounds access issue.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-develUpgrade kernel6.12-debuginfoUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-tools-develUpgrade kernel6.12-toolsUpgrade kernel6.12Upgrade kernel6.12-headersUpgrade kernel6.12-modules-extra-commonUpgrade kernel-livepatch-6.12.58-82.121Upgrade kernel6.12-modules-extraUpgrade kernel6.12-debuginfo-common-aarch64Upgrade perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-libbpf-develUpgrade bpftool6.12Upgrade kernel6.12-libbpf-staticUpgrade perf6.12Upgrade kernel6.12-libbpf-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-libbpfUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfo | Apr 7, 2026 | Dec 16, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Jan 15, 2026 | Dec 16, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 16, 2025 |
| Ubuntu | — | Upgrade linux-image-oracle-6.17Upgrade linux-image-6.17.0-14-generic-64kUpgrade linux-image-aws-64k-6.17Upgrade linux-image-azure-6.17Upgrade linux-image-6.17.0-1008-raspiUpgrade linux-image-oem-6.17Upgrade linux-image-raspi-6.17Upgrade linux-image-6.17.0-1007-gcpUpgrade linux-image-raspiUpgrade linux-image-generic-6.17Upgrade linux-image-6.17.0-1007-awsUpgrade linux-image-generic-64kUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-gcp-64kUpgrade linux-image-genericUpgrade linux-image-6.17.0-1006-realtimeUpgrade linux-image-6.17.0-1007-aws-64kUpgrade linux-image-azureUpgrade linux-image-6.17.0-1007-gcp-64kUpgrade linux-image-6.17.0-14-genericUpgrade linux-image-6.17.0-1007-oracle-64kUpgrade linux-image-6.17.0-1011-oemUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-realtime-6.17Upgrade linux-image-6.17.0-1008-azureUpgrade linux-image-generic-64k-6.17Upgrade linux-image-6.17.0-1007-oracleUpgrade linux-image-virtualUpgrade linux-image-oracle-64kUpgrade linux-image-aws-6.17Upgrade linux-image-gcpUpgrade linux-image-awsUpgrade linux-image-virtual-6.17Upgrade linux-image-realtimeUpgrade linux-image-aws-64kUpgrade linux-image-gcp-6.17Upgrade linux-image-oracle | Feb 13, 2026 | Feb 12, 2026 |
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