CVE-2026-45919

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45919", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.085Z", "datePublished": "2026-05-27T12:17:37.165Z", "dateUpdated": "2026-11-06T15:53:12.903Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:17:37.165Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/rt: Skip currently executing CPU in rto_next_cpu()\n\nCPU0 becomes overloaded when hosting a CPU-bound RT task, a non-CPU-bound\nRT task, and a CFS task stuck in kernel space. When other CPUs switch from\nRT to non-RT tasks, RT load balancing (LB) is triggered; with\nHAVE_RT_PUSH_IPI enabled, they send IPIs to CPU0 to drive the execution\nof rto_push_irq_work_func. During push_rt_task on CPU0,\nif next_task->prio < rq->donor->prio, resched_curr() sets NEED_RESCHED\nand after the push operation completes, CPU0 calls rto_next_cpu().\nSince only CPU0 is overloaded in this scenario, rto_next_cpu() should\nideally return -1 (no further IPI needed).\n\nHowever, multiple CPUs invoking tell_cpu_to_push() during LB increments\nrd->rto_loop_next. Even when rd->rto_cpu is set to -1, the mismatch between\nrd->rto_loop and rd->rto_loop_next forces rto_next_cpu() to restart its\nsearch from -1. With CPU0 remaining overloaded (satisfying rt_nr_migratory\n&& rt_nr_total > 1), it gets reselected, causing CPU0 to queue irq_work to\nitself and send self-IPIs repeatedly. As long as CPU0 stays overloaded and\nother CPUs run pull_rt_tasks(), it falls into an infinite self-IPI loop,\nwhich triggers a CPU hardlockup due to continuous self-interrupts.\n\nThe trigging scenario is as follows:\n\n cpu0 cpu1 cpu2\n pull_rt_task\n tell_cpu_to_push\n <------------irq_work_queue_on\nrto_push_irq_work_func\n push_rt_task\n resched_curr(rq) pull_rt_task\n rto_next_cpu tell_cpu_to_push\n <-------------------------- atomic_inc(rto_loop_next)\nrd->rto_loop != next\n rto_next_cpu\n irq_work_queue_on\nrto_push_irq_work_func\n\nFix redundant self-IPI by filtering the initiating CPU in rto_next_cpu().\nThis solution has been verified to effectively eliminate spurious self-IPIs\nand prevent CPU hardlockup scenarios."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/sched/rt.c"], "versions": [{"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "d57d0746276a88ea43a2cc62b849fd8a95e32e41", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "3b3c672a66db3de3b40f8a7057864bc1f874ede3", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "16ca9f3117e9a294646c897daf08a5ab546c711b", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "8ad5577b2d4acfd83f03d97a0aece2d18aac5f07", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "a6a73403733e86748421f2eeaf028c85683ef896", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "52aeb1e07ec223caf212f036817976c98d2aa250", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "9f25edc5a20cb52a5abbf25f0724bb4732b81801", "status": "affected", "versionType": "git"}, {"version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "94894c9c477e53bcea052e075c53f89df3d2a33e", "status": "affected", "versionType": "git"}, {"version": "cb1831a83e54cd3269a2420fce81c4fd8ae6f667", "status": "affected", "versionType": "git"}, {"version": "1c37ff78298a6b6063649123356a312e1cce12ca", "status": "affected", "versionType": "git"}, {"version": "f17c786b28a3060a566a170c2cf3bd7441fc30a3", "status": "affected", "versionType": "git"}, {"version": "4.4.103", "lessThan": "4.5", "status": "affected", "versionType": "semver"}, {"version": "4.9.66", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.3", "lessThan": "4.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/sched/rt.c"], "versions": [{"version": "4.15", "status": "affected"}, {"version": "0", "lessThan": "4.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.10.252"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "5.15.202"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.15", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.66"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d57d0746276a88ea43a2cc62b849fd8a95e32e41"}, {"url": "https://git.kernel.org/stable/c/3b3c672a66db3de3b40f8a7057864bc1f874ede3"}, {"url": "https://git.kernel.org/stable/c/16ca9f3117e9a294646c897daf08a5ab546c711b"}, {"url": "https://git.kernel.org/stable/c/8ad5577b2d4acfd83f03d97a0aece2d18aac5f07"}, {"url": "https://git.kernel.org/stable/c/a6a73403733e86748421f2eeaf028c85683ef896"}, {"url": "https://git.kernel.org/stable/c/52aeb1e07ec223caf212f036817976c98d2aa250"}, {"url": "https://git.kernel.org/stable/c/9f25edc5a20cb52a5abbf25f0724bb4732b81801"}, {"url": "https://git.kernel.org/stable/c/94894c9c477e53bcea052e075c53f89df3d2a33e"}], "title": "sched/rt: Skip currently executing CPU in rto_next_cpu()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45919", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:44:31.654477Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T15:53:12.903Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45919", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:44:31.654477Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T15:44:32.805Z"}}], "cna": {"title": "sched/rt: Skip currently executing CPU in rto_next_cpu()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "d57d0746276a88ea43a2cc62b849fd8a95e32e41", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "3b3c672a66db3de3b40f8a7057864bc1f874ede3", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "16ca9f3117e9a294646c897daf08a5ab546c711b", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "8ad5577b2d4acfd83f03d97a0aece2d18aac5f07", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "a6a73403733e86748421f2eeaf028c85683ef896", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "52aeb1e07ec223caf212f036817976c98d2aa250", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "9f25edc5a20cb52a5abbf25f0724bb4732b81801", "versionType": "git"}, {"status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "lessThan": "94894c9c477e53bcea052e075c53f89df3d2a33e", "versionType": "git"}, {"status": "affected", "version": "cb1831a83e54cd3269a2420fce81c4fd8ae6f667", "versionType": "git"}, {"status": "affected", "version": "1c37ff78298a6b6063649123356a312e1cce12ca", "versionType": "git"}, {"status": "affected", "version": "f17c786b28a3060a566a170c2cf3bd7441fc30a3", "versionType": "git"}, {"status": "affected", "version": "4.4.103", "lessThan": "4.5", "versionType": "semver"}, {"status": "affected", "version": "4.9.66", "lessThan": "4.10", "versionType": "semver"}, {"status": "affected", "version": "4.14.3", "lessThan": "4.15", "versionType": "semver"}], "programFiles": ["kernel/sched/rt.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"status": "unaffected", "version": "0", "lessThan": "4.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.252", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.202", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.165", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.128", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.14", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.4", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/sched/rt.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d57d0746276a88ea43a2cc62b849fd8a95e32e41"}, {"url": "https://git.kernel.org/stable/c/3b3c672a66db3de3b40f8a7057864bc1f874ede3"}, {"url": "https://git.kernel.org/stable/c/16ca9f3117e9a294646c897daf08a5ab546c711b"}, {"url": "https://git.kernel.org/stable/c/8ad5577b2d4acfd83f03d97a0aece2d18aac5f07"}, {"url": "https://git.kernel.org/stable/c/a6a73403733e86748421f2eeaf028c85683ef896"}, {"url": "https://git.kernel.org/stable/c/52aeb1e07ec223caf212f036817976c98d2aa250"}, {"url": "https://git.kernel.org/stable/c/9f25edc5a20cb52a5abbf25f0724bb4732b81801"}, {"url": "https://git.kernel.org/stable/c/94894c9c477e53bcea052e075c53f89df3d2a33e"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/rt: Skip currently executing CPU in rto_next_cpu()\n\nCPU0 becomes overloaded when hosting a CPU-bound RT task, a non-CPU-bound\nRT task, and a CFS task stuck in kernel space. When other CPUs switch from\nRT to non-RT tasks, RT load balancing (LB) is triggered; with\nHAVE_RT_PUSH_IPI enabled, they send IPIs to CPU0 to drive the execution\nof rto_push_irq_work_func. During push_rt_task on CPU0,\nif next_task->prio < rq->donor->prio, resched_curr() sets NEED_RESCHED\nand after the push operation completes, CPU0 calls rto_next_cpu().\nSince only CPU0 is overloaded in this scenario, rto_next_cpu() should\nideally return -1 (no further IPI needed).\n\nHowever, multiple CPUs invoking tell_cpu_to_push() during LB increments\nrd->rto_loop_next. Even when rd->rto_cpu is set to -1, the mismatch between\nrd->rto_loop and rd->rto_loop_next forces rto_next_cpu() to restart its\nsearch from -1. With CPU0 remaining overloaded (satisfying rt_nr_migratory\n&& rt_nr_total > 1), it gets reselected, causing CPU0 to queue irq_work to\nitself and send self-IPIs repeatedly. As long as CPU0 stays overloaded and\nother CPUs run pull_rt_tasks(), it falls into an infinite self-IPI loop,\nwhich triggers a CPU hardlockup due to continuous self-interrupts.\n\nThe trigging scenario is as follows:\n\n cpu0 cpu1 cpu2\n pull_rt_task\n tell_cpu_to_push\n <------------irq_work_queue_on\nrto_push_irq_work_func\n push_rt_task\n resched_curr(rq) pull_rt_task\n rto_next_cpu tell_cpu_to_push\n <-------------------------- atomic_inc(rto_loop_next)\nrd->rto_loop != next\n rto_next_cpu\n irq_work_queue_on\nrto_push_irq_work_func\n\nFix redundant self-IPI by filtering the initiating CPU in rto_next_cpu().\nThis solution has been verified to effectively eliminate spurious self-IPIs\nand prevent CPU hardlockup scenarios."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.252", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.202", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.165", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.128", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.75", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.14", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.4", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.4.103"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.9.66"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "4.14.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-27T12:17:37.165Z"}}}, "cveMetadata": {"cveId": "CVE-2026-45919", "state": "PUBLISHED", "dateUpdated": "2026-11-06T15:53:12.903Z", "dateReserved": "2026-05-13T15:03:33.085Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-27T12:17:37.165Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/sched/rt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d57d0746276a88ea43a2cc62b849fd8a95e32e41", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "3b3c672a66db3de3b40f8a7057864bc1f874ede3", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "16ca9f3117e9a294646c897daf08a5ab546c711b", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "8ad5577b2d4acfd83f03d97a0aece2d18aac5f07", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "a6a73403733e86748421f2eeaf028c85683ef896", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "52aeb1e07ec223caf212f036817976c98d2aa250", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "9f25edc5a20cb52a5abbf25f0724bb4732b81801", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"lessThan": "94894c9c477e53bcea052e075c53f89df3d2a33e", "status": "affected", "version": "4bdced5c9a2922521e325896a7bbbf0132c94e56", "versionType": "git"}, {"status": "affected", "version": "cb1831a83e54cd3269a2420fce81c4fd8ae6f667", "versionType": "git"}, {"status": "affected", "version": "1c37ff78298a6b6063649123356a312e1cce12ca", "versionType": "git"}, {"status": "affected", "version": "f17c786b28a3060a566a170c2cf3bd7441fc30a3", "versionType": "git"}, {"lessThan": "4.5", "status": "affected", "version": "4.4.103", "versionType": "semver"}, {"lessThan": "4.10", "status": "affected", "version": "4.9.66", "versionType": "semver"}, {"lessThan": "4.15", "status": "affected", "version": "4.14.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/sched/rt.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.15"}, {"lessThan": "4.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.252", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.202", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.165", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.128", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.14", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "650D32F8-EA77-4DD0-853E-00A5D3748221", "versionEndExcluding": "4.5", "versionStartIncluding": "4.4.103", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "FF2C4C8C-49AC-4AAC-B560-0B3654CD08C8", "versionEndExcluding": "4.10", "versionStartIncluding": "4.9.66", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5A4DEEA0-84F0-4879-AA92-93C5595569E4", "versionEndExcluding": "5.10.252", "versionStartIncluding": "4.14.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4002FC2B-1456-4666-B240-0EBF590C4671", "versionEndExcluding": "5.15.202", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/rt: Skip currently executing CPU in rto_next_cpu()\n\nCPU0 becomes overloaded when hosting a CPU-bound RT task, a non-CPU-bound\nRT task, and a CFS task stuck in kernel space. When other CPUs switch from\nRT to non-RT tasks, RT load balancing (LB) is triggered; with\nHAVE_RT_PUSH_IPI enabled, they send IPIs to CPU0 to drive the execution\nof rto_push_irq_work_func. During push_rt_task on CPU0,\nif next_task->prio < rq->donor->prio, resched_curr() sets NEED_RESCHED\nand after the push operation completes, CPU0 calls rto_next_cpu().\nSince only CPU0 is overloaded in this scenario, rto_next_cpu() should\nideally return -1 (no further IPI needed).\n\nHowever, multiple CPUs invoking tell_cpu_to_push() during LB increments\nrd->rto_loop_next. Even when rd->rto_cpu is set to -1, the mismatch between\nrd->rto_loop and rd->rto_loop_next forces rto_next_cpu() to restart its\nsearch from -1. With CPU0 remaining overloaded (satisfying rt_nr_migratory\n&& rt_nr_total > 1), it gets reselected, causing CPU0 to queue irq_work to\nitself and send self-IPIs repeatedly. As long as CPU0 stays overloaded and\nother CPUs run pull_rt_tasks(), it falls into an infinite self-IPI loop,\nwhich triggers a CPU hardlockup due to continuous self-interrupts.\n\nThe trigging scenario is as follows:\n\n cpu0 cpu1 cpu2\n pull_rt_task\n tell_cpu_to_push\n <------------irq_work_queue_on\nrto_push_irq_work_func\n push_rt_task\n resched_curr(rq) pull_rt_task\n rto_next_cpu tell_cpu_to_push\n <-------------------------- atomic_inc(rto_loop_next)\nrd->rto_loop != next\n rto_next_cpu\n irq_work_queue_on\nrto_push_irq_work_func\n\nFix redundant self-IPI by filtering the initiating CPU in rto_next_cpu().\nThis solution has been verified to effectively eliminate spurious self-IPIs\nand prevent CPU hardlockup scenarios."}], "id": "CVE-2026-45919", "lastModified": "2026-11-06T16:18:52.047", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45919", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:44:31.654477Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:06.790", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/16ca9f3117e9a294646c897daf08a5ab546c711b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b3c672a66db3de3b40f8a7057864bc1f874ede3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52aeb1e07ec223caf212f036817976c98d2aa250"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8ad5577b2d4acfd83f03d97a0aece2d18aac5f07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/94894c9c477e53bcea052e075c53f89df3d2a33e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9f25edc5a20cb52a5abbf25f0724bb4732b81801"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a6a73403733e86748421f2eeaf028c85683ef896"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d57d0746276a88ea43a2cc62b849fd8a95e32e41"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sched/rt: Skip currently executing CPU in rto_next_cpu()", "id": "2481981", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2481981"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-835", "details": ["A flaw was found in the Linux kernel's real-time (RT) scheduler. Under specific heavy load conditions, a vulnerability in the rto_next_cpu() function can cause a CPU to repeatedly interrupt itself. This leads to a CPU hardlockup, resulting in a Denial of Service (DoS) for the system. This issue can be triggered by a local user or specific system workloads."], "name": "CVE-2026-45919", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45919\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45919\nhttps://lore.kernel.org/linux-cve-announce/2026052724-CVE-2026-45919-5649@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.4.103,4.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.9.66,4.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.14.3,4.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced5c9a2922521e325896a7bbbf0132c94e56,d57d0746276a88ea43a2cc62b849fd8a95e32e41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced5c9a2922521e325896a7bbbf0132c94e56,3b3c672a66db3de3b40f8a7057864bc1f874ede3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,16ca9f3117e9a294646c897daf08a5ab546c711b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,8ad5577b2d4acfd83f03d97a0aece2d18aac5f07)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,a6a73403733e86748421f2eeaf028c85683ef896)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,52aeb1e07ec223caf212f036817976c98d2aa250)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,9f25edc5a20cb52a5abbf25f0724bb4732b81801)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4bdced... ,94894c9c477e53bcea052e075c53f89df3d2a33e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "cb1831a83e54cd3269a2420fce81c4fd8ae6f667"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "1c37ff78298a6b6063649123356a312e1cce12ca"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f17c786b28a3060a566a170c2cf3bd7441fc30a3"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.252,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.202,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.165,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.128,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.75,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.14,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.4,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T16:45:38.112621+00:00", "updated": "2026-05-28T16:30:15.373231+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}