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Vulnerability · Published Oct 28, 2026 · Assigned by Linux

CVE-2026-99187perf: Fix perf_pmu_migrate_context() leaving events behind

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 93.1% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: perf: Fix perf_pmu_migrate_context() leaving events behind __perf_pmu_remove() walks the group leaders of a CPU and PMU with perf_event_groups_for_cpu_pmu(), removing each one as it goes. perf_remove_from_context() takes the leader out of the groups rbtree, after which rb_next() on that node returns NULL, prematurely ending the walk. Other groups stay behind in the source context. On CPU hotplug, they are then torn down with the dying CPU. They keep running until teardown, while the PMU's interrupt and migrated events are on a new CPU, which drivers rely on never happening. Walk ctx->event_list instead and pick out the PMU's events by their pmu_ctx.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.115-2DEBIAN-CVE-2026-99187
Debian:14linux7.2.13-1DEBIAN-CVE-2026-99187
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99187
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99187
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99187
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99187

Affected products (as reported)

VendorProductVersions
Linux Linux bd27568117664b8b3e259721393df420ed51f57b – before 3caf006eb731e88cbb33fb5b7d1f2fdb23712bc7bd27568117664b8b3e259721393df420ed51f57b – before d4002e954c612dfc7e3fb5549e4a188ea281fe35bd27568117664b8b3e259721393df420ed51f57b – before 3eb08f09bfb364051f51316da873c3bd51a839efbd27568117664b8b3e259721393df420ed51f57b – before f5f0028764de322a3d04eda0d3b6389ca9847446bd27568117664b8b3e259721393df420ed51f57b – before e76b36b4be7160eaa14b416681e548b125702395
Linux Linux 6.2

References