{"cve":"CVE-2026-46154","nvd":{"published":"2026-05-28T10:16:31.040","modified":"2026-06-17T10:53:10.710","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsched_ext: Read scx_root under scx_cgroup_ops_rwsem in cgroup setters\n\nscx_group_set_{weight,idle,bandwidth}() cache scx_root before acquiring\nscx_cgroup_ops_rwsem, so the pointer can be stale by the time the op runs.\nIf the loaded scheduler is disabled and freed (via RCU work) and another is\nenabled between the naked load and the rwsem acquire, the reader sees\nscx_cgroup_enabled=true (the new scheduler's) but dereferences the freed one\n- UAF on SCX_HAS_OP(sch, ...) / SCX_CALL_OP(sch, ...).\n\nscx_cgroup_enabled is toggled only under scx_cgroup_ops_rwsem write\n(scx_cgroup_{init,exit}), so reading scx_root inside the rwsem read section\ncorrelates @sch with the enabled snapshot.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.0},"cwes":["CWE-416"],"references":["https://git.kernel.org/stable/c/0f54f6355575971673d8aac7da107ec4178e45bd","https://git.kernel.org/stable/c/80afd4c84bc8f5e80145ce35279f5ce53f6043db","https://git.kernel.org/stable/c/ce9aaa3af445c391735c9d000c4db60dfd5640d4"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-46154","score":0.0012,"percentile":0.0181,"date":"2026-10-31"},"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."]}