{"cve":"CVE-2026-99187","nvd":{"published":"2026-10-28T11:17:39.610","modified":"2026-10-28T11:17:39.610","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix perf_pmu_migrate_context() leaving events behind\n\n__perf_pmu_remove() walks the group leaders of a CPU and PMU with\nperf_event_groups_for_cpu_pmu(), removing each one as it goes.\nperf_remove_from_context() takes the leader out of the groups rbtree,\nafter which rb_next() on that node returns NULL, prematurely ending the\nwalk. Other groups stay behind in the source context.\n\nOn CPU hotplug, they are then torn down with the dying CPU. They keep\nrunning until teardown, while the PMU's interrupt and migrated events\nare on a new CPU, which drivers rely on never happening.\n\nWalk ctx->event_list instead and pick out the PMU's events by their\npmu_ctx.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/3eb08f09bfb364051f51316da873c3bd51a839ef","https://git.kernel.org/stable/c/e76b36b4be7160eaa14b416681e548b125702395","https://git.kernel.org/stable/c/f5f0028764de322a3d04eda0d3b6389ca9847446"],"products":[],"source":"nvd","synced_at":"2026-10-28T11:37:51.394563875+00:00"},"epss":null,"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}