{"cve":"CVE-2023-54246","nvd":{"published":"2025-12-30T13:16:13.210","modified":"2026-06-17T06:47:05.173","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrcuscale: Move rcu_scale_writer() schedule_timeout_uninterruptible() to _idle()\n\nThe rcuscale.holdoff module parameter can be used to delay the start\nof rcu_scale_writer() kthread.  However, the hung-task timeout will\ntrigger when the timeout specified by rcuscale.holdoff is greater than\nhung_task_timeout_secs:\n\nrunqemu kvm nographic slirp qemuparams=\"-smp 4 -m 2048M\"\nbootparams=\"rcuscale.shutdown=0 rcuscale.holdoff=300\"\n\n[  247.071753] INFO: task rcu_scale_write:59 blocked for more than 122 seconds.\n[  247.072529]       Not tainted 6.4.0-rc1-00134-gb9ed6de8d4ff #7\n[  247.073400] \"echo 0 > /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  247.074331] task:rcu_scale_write state:D stack:30144 pid:59    ppid:2      flags:0x00004000\n[  247.075346] Call Trace:\n[  247.075660]  <TASK>\n[  247.075965]  __schedule+0x635/0x1280\n[  247.076448]  ? __pfx___schedule+0x10/0x10\n[  247.076967]  ? schedule_timeout+0x2dc/0x4d0\n[  247.077471]  ? __pfx_lock_release+0x10/0x10\n[  247.078018]  ? enqueue_timer+0xe2/0x220\n[  247.078522]  schedule+0x84/0x120\n[  247.078957]  schedule_timeout+0x2e1/0x4d0\n[  247.079447]  ? __pfx_schedule_timeout+0x10/0x10\n[  247.080032]  ? __pfx_rcu_scale_writer+0x10/0x10\n[  247.080591]  ? __pfx_process_timeout+0x10/0x10\n[  247.081163]  ? __pfx_sched_set_fifo_low+0x10/0x10\n[  247.081760]  ? __pfx_rcu_scale_writer+0x10/0x10\n[  247.082287]  rcu_scale_writer+0x6b1/0x7f0\n[  247.082773]  ? mark_held_locks+0x29/0xa0\n[  247.083252]  ? __pfx_rcu_scale_writer+0x10/0x10\n[  247.083865]  ? __pfx_rcu_scale_writer+0x10/0x10\n[  247.084412]  kthread+0x179/0x1c0\n[  247.084759]  ? __pfx_kthread+0x10/0x10\n[  247.085098]  ret_from_fork+0x2c/0x50\n[  247.085433]  </TASK>\n\nThis commit therefore replaces schedule_timeout_uninterruptible() with\nschedule_timeout_idle().","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/4f03fba096bfded90e0d71eba8839a46922164d1","https://git.kernel.org/stable/c/55887adc76e19aec9763186e2c1d0a3481d20e96","https://git.kernel.org/stable/c/83ed0cdb6ae0383dd14b02375c353773836884ed","https://git.kernel.org/stable/c/9416dccb31fdb190d25d57e97674f232651f6560","https://git.kernel.org/stable/c/e60c122a1614b4f65b29a7bef9d83b9fd30e937a"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:18:08.089039631+00:00"},"epss":{"cve":"CVE-2023-54246","score":0.002,"percentile":0.09906,"date":"2026-11-01"},"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."]}