{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38234", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38234", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-07-04T13:37:46.960Z", "updatedAt": "2026-10-15T21:52:11.897Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "sched/rt: Fix race in push_rt_task", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/rt: Fix race in push_rt_task\n\nOverview\n========\nWhen a CPU chooses to call push_rt_task and picks a task to push to\nanother CPU's runqueue then it will call find_lock_lowest_rq method\nwhich would take a double lock on both CPUs' runqueues. If one of the\nlocks aren't readily available, it may lead to dropping the current\nrunqueue lock and reacquiring both the locks at once. During this window\nit is possible that the task is already migrated and is running on some\nother CPU. These cases are already handled. However, if the task is\nmigrated and has already been executed and another CPU is now trying to\nwake it up (ttwu) such that it is queued again on the runqeue\n(on_rq is 1) and also if the task was run by the same CPU, then the\ncurrent checks will pass even though the task was migrated out and is no\nlonger in the pushable tasks list.\n\nCrashes\n=======\nThis bug resulted in quite a few flavors of crashes triggering kernel\npanics with various crash signatures such as assert failures, page\nfaults, null pointer dereferences, and queue corruption errors all\ncoming from scheduler itself.\n\nSome of the crashes:\n-> kernel BUG at kernel/sched/rt.c:1616! BUG_ON(idx >= MAX_RT_PRIO)\n Call Trace:\n ? __die_body+0x1a/0x60\n ? die+0x2a/0x50\n ? do_trap+0x85/0x100\n ? pick_next_task_rt+0x6e/0x1d0\n ? do_error_trap+0x64/0xa0\n ? pick_next_task_rt+0x6e/0x1d0\n ? exc_invalid_op+0x4c/0x60\n ? pick_next_task_rt+0x6e/0x1d0\n ? asm_exc_invalid_op+0x12/0x20\n ? pick_next_task_rt+0x6e/0x1d0\n __schedule+0x5cb/0x790\n ? update_ts_time_stats+0x55/0x70\n schedule_idle+0x1e/0x40\n do_idle+0x15e/0x200\n cpu_startup_entry+0x19/0x20\n start_secondary+0x117/0x160\n secondary_startup_64_no_verify+0xb0/0xbb\n\n-> BUG: kernel NULL pointer dereference, address: 00000000000000c0\n Call Trace:\n ? __die_body+0x1a/0x60\n ? no_context+0x183/0x350\n ? __warn+0x8a/0xe0\n ? exc_page_fault+0x3d6/0x520\n ? asm_exc_page_fault+0x1e/0x30\n ? pick_next_task_rt+0xb5/0x1d0\n ? pick_next_task_rt+0x8c/0x1d0\n __schedule+0x583/0x7e0\n ? update_ts_time_stats+0x55/0x70\n schedule_idle+0x1e/0x40\n do_idle+0x15e/0x200\n cpu_startup_entry+0x19/0x20\n start_secondary+0x117/0x160\n secondary_startup_64_no_verify+0xb0/0xbb\n\n-> BUG: unable to handle page fault for address: ffff9464daea5900\n kernel BUG at kernel/sched/rt.c:1861! BUG_ON(rq->cpu != task_cpu(p))\n\n-> kernel BUG at kernel/sched/rt.c:1055! BUG_ON(!rq->nr_running)\n Call Trace:\n ? __die_body+0x1a/0x60\n ? die+0x2a/0x50\n ? do_trap+0x85/0x100\n ? dequeue_top_rt_rq+0xa2/0xb0\n ? do_error_trap+0x64/0xa0\n ? dequeue_top_rt_rq+0xa2/0xb0\n ? exc_invalid_op+0x4c/0x60\n ? dequeue_top_rt_rq+0xa2/0xb0\n ? asm_exc_invalid_op+0x12/0x20\n ? dequeue_top_rt_rq+0xa2/0xb0\n dequeue_rt_entity+0x1f/0x70\n dequeue_task_rt+0x2d/0x70\n __schedule+0x1a8/0x7e0\n ? blk_finish_plug+0x25/0x40\n schedule+0x3c/0xb0\n futex_wait_queue_me+0xb6/0x120\n futex_wait+0xd9/0x240\n do_futex+0x344/0xa90\n ? get_mm_exe_file+0x30/0x60\n ? audit_exe_compare+0x58/0x70\n ? audit_filter_rules.constprop.26+0x65e/0x1220\n __x64_sys_futex+0x148/0x1f0\n do_syscall_64+0x30/0x80\n entry_SYSCALL_64_after_hwframe+0x62/0xc7\n\n-> BUG: unable to handle page fault for address: ffff8cf3608bc2c0\n Call Trace:\n ? __die_body+0x1a/0x60\n ? no_context+0x183/0x350\n ? spurious_kernel_fault+0x171/0x1c0\n ? exc_page_fault+0x3b6/0x520\n ? plist_check_list+0x15/0x40\n ? plist_check_list+0x2e/0x40\n ? asm_exc_page_fault+0x1e/0x30\n ? _cond_resched+0x15/0x30\n ? futex_wait_queue_me+0xc8/0x120\n ? futex_wait+0xd9/0x240\n ? try_to_wake_up+0x1b8/0x490\n ? futex_wake+0x78/0x160\n ? do_futex+0xcd/0xa90\n ? plist_check_list+0x15/0x40\n ? plist_check_list+0x2e/0x40\n ? plist_del+0x6a/0xd0\n ? plist_check_list+0x15/0x40\n ? plist_check_list+0x2e/0x40\n ? dequeue_pushable_task+0x20/0x70\n ? __schedule+0x382/0x7e0\n ? asm_sysvec_reschedule_i\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e8fa136262e1121288bb93befe2295928ffd240d", "status": "affected", "versionType": "git", "lessThan": "9f6022b2573ae068793810db719e131df3ded405" }, { "version": "e8fa136262e1121288bb93befe2295928ffd240d", "status": "affected", "versionType": "git", "lessThan": "debfbc047196df1f6bfd52f2d028c21dce67f0de" }, { "version": "e8fa136262e1121288bb93befe2295928ffd240d", "status": "affected", "versionType": "git", "lessThan": "07ecabfbca64f4f0b6071cf96e49d162fa9d138d" }, { "version": "e8fa136262e1121288bb93befe2295928ffd240d", "status": "affected", "versionType": "git", "lessThan": "690e47d1403e90b7f2366f03b52ed3304194c793" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.25" }, { "version": "6.6.124", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.64", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.15.4", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.15.*" }, { "version": "6.16", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }