{"id":"CVE-2026-23311","summary":"perf/core: Fix invalid wait context in ctx_sched_in()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix invalid wait context in ctx_sched_in()\n\nLockdep found a bug in the event scheduling when a pinned event was\nfailed and wakes up the threads in the ring buffer like below.\n\nIt seems it should not grab a wait-queue lock under perf-context lock.\nLet's do it with irq_work.\n\n  [   39.913691] =============================\n  [   39.914157] [ BUG: Invalid wait context ]\n  [   39.914623] 6.15.0-next-20250530-next-2025053 #1 Not tainted\n  [   39.915271] -----------------------------\n  [   39.915731] repro/837 is trying to lock:\n  [   39.916191] ffff88801acfabd8 (&event-\u003ewaitq){....}-{3:3}, at: __wake_up+0x26/0x60\n  [   39.917182] other info that might help us debug this:\n  [   39.917761] context-{5:5}\n  [   39.918079] 4 locks held by repro/837:\n  [   39.918530]  #0: ffffffff8725cd00 (rcu_read_lock){....}-{1:3}, at: __perf_event_task_sched_in+0xd1/0xbc0\n  [   39.919612]  #1: ffff88806ca3c6f8 (&cpuctx_lock){....}-{2:2}, at: __perf_event_task_sched_in+0x1a7/0xbc0\n  [   39.920748]  #2: ffff88800d91fc18 (&ctx-\u003elock){....}-{2:2}, at: __perf_event_task_sched_in+0x1f9/0xbc0\n  [   39.921819]  #3: ffffffff8725cd00 (rcu_read_lock){....}-{1:3}, at: perf_event_wakeup+0x6c/0x470","modified":"2026-04-02T13:12:20.985157Z","published":"2026-03-25T10:27:06.915Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23311.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/486ff5ad49bc50315bcaf6d45f04a33ef0a45ced"},{"type":"WEB","url":"https://git.kernel.org/stable/c/825f218ca70ef394c2b8546b313711d867b24584"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c67ab059953e3b66cb17ddd6524c23f9e1f6526d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23311.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23311"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f4b07fd62d4d11d57a15cb4ae01b3833282eb8f6"},{"fixed":"c67ab059953e3b66cb17ddd6524c23f9e1f6526d"},{"fixed":"825f218ca70ef394c2b8546b313711d867b24584"},{"fixed":"486ff5ad49bc50315bcaf6d45f04a33ef0a45ced"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23311.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.18.17"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23311.json"}}],"schema_version":"1.7.5"}