{"cve":"CVE-2026-46042","nvd":{"published":"2026-05-27T14:17:23.633","modified":"2026-06-17T10:52:57.130","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mempolicy: fix memory leaks in weighted_interleave_auto_store()\n\nweighted_interleave_auto_store() fetches old_wi_state inside the if\n(!input) block only.  This causes two memory leaks:\n\n1. When a user writes \"false\" and the current mode is already manual,\n   the function returns early without freeing the freshly allocated\n   new_wi_state.\n\n2. When a user writes \"true\", old_wi_state stays NULL because the\n   fetch is skipped entirely. The old state is then overwritten by\n   rcu_assign_pointer() but never freed, since the cleanup path is\n   gated on old_wi_state being non-NULL. A user can trigger this\n   repeatedly by writing \"1\" in a loop.\n\nFix both leaks by moving the old_wi_state fetch before the input check,\nmaking it unconditional.  This also allows a unified early return for both\n\"true\" and \"false\" when the requested mode matches the current mode.\n\nReviewed by: Donet Tom <donettom@linux.ibm.com>","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-401"],"references":["https://git.kernel.org/stable/c/39caa9ca863f96b3d00447c5aa200cabda489856","https://git.kernel.org/stable/c/6fae274ce0e3109cbbc4c18b354eaace1f0af7d7","https://git.kernel.org/stable/c/c42a7efb9060d89b72708ffaf255d0002c2164a7"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-46042","score":0.00126,"percentile":0.02283,"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."]}