{"id":"CVE-2026-89753","revision":"f7fb30a3f591479f84f1604a3a9f04e1","records":[{"revision":"f7fb30a3f591479f84f1604a3a9f04e1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89753","aliases":[],"title":"mm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: report RCU-tasks quiescent states in shrink_lruvec()\n\nI am seeing some rcu_tasks stalls in the Meta fleet during reclaim.\n\n  INFO: rcu_tasks detected stalls on tasks:\n\t0000000088620d09: .. nvcsw: 6735/6735 holdout: 1 idle_cpu: -1/8\n\ttask:GlobalCPUThread state:R  running task  pid:2552016 tgid:2524552\n  Call Trace:\n   shrink_lruvec\n   mem_cgroup_iter\n   shrink_node\n   do_try_to_free_pages\n   try_to_free_pages\n   __alloc_frozen_pages_noprof\n   alloc_pages_noprof\n   pte_alloc_one\n   __pte_alloc\n   handle_mm_fault\n\nNothing promises direct reclaim returns in bounded time, and the scan loop\nin shrink_lruvec() only calls cond_resched(), which is a no-op on\nPREEMPTION kernels.  Involuntary preemption is not a Tasks-RCU quiescent\nstate, so the reclaiming task never reports one and becomes a holdout.\n\nUpgrade it to cond_resched_tasks_rcu_qs(), which reports a quiescent state\neven when cond_resched() does nothing.\n\nPS: This has been discussed in [1]","state":0,"publishedAt":"2026-09-11T19:46:56.806+00:00","modifiedAt":"2026-10-19T08:52:06.974+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"mm/vmscan.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"4cdc1bdf40944de5c6b118fef07ad23f07844338\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"029c9408049f7f582230322057b7075bea594fd5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"b5391676c61d94ffe3272dcf6723738b802f79e8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"3fd50239986302cb050d3649351bcec00fa9d5ab\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"cf3ba0911a1cf8680371ff113b90088edd01d2bb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8315f42295d2667a7f942f154b73a86fd7cb2227\",\n                            \"lessThan\": \"25f52e81216884a7444bf07a606691feb09a94e3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"mm/vmscan.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3.18\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"3.18\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.109\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.50\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.4\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/4f50593c9cbc883d8c9b50148a3e8a8b1fd35f57","https://git.kernel.org/stable/c/4cdc1bdf40944de5c6b118fef07ad23f07844338","https://git.kernel.org/stable/c/a67a00a70a7c8309ca47ea157ef3e8ed3d268f5b","https://git.kernel.org/stable/c/029c9408049f7f582230322057b7075bea594fd5","https://git.kernel.org/stable/c/b5391676c61d94ffe3272dcf6723738b802f79e8","https://git.kernel.org/stable/c/3fd50239986302cb050d3649351bcec00fa9d5ab","https://git.kernel.org/stable/c/cf3ba0911a1cf8680371ff113b90088edd01d2bb","https://git.kernel.org/stable/c/25f52e81216884a7444bf07a606691feb09a94e3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89753","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89753","identifiers":["CVE-2026-89753"]},"retained":false,"historicalAffected":[]}],"coverage":[]}