{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-53215", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-15T14:19:21.845Z", "datePublished": "2025-09-15T14:21:43.107Z", "dateUpdated": "2025-09-15T14:21:43.107Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-15T14:21:43.107Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/fair: Don't balance task to its current running CPU\n\nWe've run into the case that the balancer tries to balance a migration\ndisabled task and trigger the warning in set_task_cpu() like below:\n\n ------------[ cut here ]------------\n WARNING: CPU: 7 PID: 0 at kernel/sched/core.c:3115 set_task_cpu+0x188/0x240\n Modules linked in: hclgevf xt_CHECKSUM ipt_REJECT nf_reject_ipv4 <...snip>\n CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G O 6.1.0-rc4+ #1\n Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V5.B221.01 12/09/2021\n pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : set_task_cpu+0x188/0x240\n lr : load_balance+0x5d0/0xc60\n sp : ffff80000803bc70\n x29: ffff80000803bc70 x28: ffff004089e190e8 x27: ffff004089e19040\n x26: ffff007effcabc38 x25: 0000000000000000 x24: 0000000000000001\n x23: ffff80000803be84 x22: 000000000000000c x21: ffffb093e79e2a78\n x20: 000000000000000c x19: ffff004089e19040 x18: 0000000000000000\n x17: 0000000000001fad x16: 0000000000000030 x15: 0000000000000000\n x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000000\n x11: 0000000000000001 x10: 0000000000000400 x9 : ffffb093e4cee530\n x8 : 00000000fffffffe x7 : 0000000000ce168a x6 : 000000000000013e\n x5 : 00000000ffffffe1 x4 : 0000000000000001 x3 : 0000000000000b2a\n x2 : 0000000000000b2a x1 : ffffb093e6d6c510 x0 : 0000000000000001\n Call trace:\n set_task_cpu+0x188/0x240\n load_balance+0x5d0/0xc60\n rebalance_domains+0x26c/0x380\n _nohz_idle_balance.isra.0+0x1e0/0x370\n run_rebalance_domains+0x6c/0x80\n __do_softirq+0x128/0x3d8\n ____do_softirq+0x18/0x24\n call_on_irq_stack+0x2c/0x38\n do_softirq_own_stack+0x24/0x3c\n __irq_exit_rcu+0xcc/0xf4\n irq_exit_rcu+0x18/0x24\n el1_interrupt+0x4c/0xe4\n el1h_64_irq_handler+0x18/0x2c\n el1h_64_irq+0x74/0x78\n arch_cpu_idle+0x18/0x4c\n default_idle_call+0x58/0x194\n do_idle+0x244/0x2b0\n cpu_startup_entry+0x30/0x3c\n secondary_start_kernel+0x14c/0x190\n __secondary_switched+0xb0/0xb4\n ---[ end trace 0000000000000000 ]---\n\nFurther investigation shows that the warning is superfluous, the migration\ndisabled task is just going to be migrated to its current running CPU.\nThis is because that on load balance if the dst_cpu is not allowed by the\ntask, we'll re-select a new_dst_cpu as a candidate. If no task can be\nbalanced to dst_cpu we'll try to balance the task to the new_dst_cpu\ninstead. In this case when the migration disabled task is not on CPU it\nonly allows to run on its current CPU, load balance will select its\ncurrent CPU as new_dst_cpu and later triggers the warning above.\n\nThe new_dst_cpu is chosen from the env->dst_grpmask. Currently it\ncontains CPUs in sched_group_span() and if we have overlapped groups it's\npossible to run into this case. This patch makes env->dst_grpmask of\ngroup_balance_mask() which exclude any CPUs from the busiest group and\nsolve the issue. For balancing in a domain with no overlapped groups\nthe behaviour keeps same as before."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/sched/fair.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "32d937f94b7805d4c9028b8727a7d6241547da54", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a5286f4655ce2fa28f477c0b957ea7f323fe2fab", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cec1857b1ea5cc3ea2b600564f1c95d1a6f27ad1", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6b0c79aa33075b34c3cdcea4132c0afb3fc42d68", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3cb43222bab8ab328fc91ed30899b3df2efbccfd", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "78a5f711efceb37e32c48cd6b40addb671fea9cc", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "34eb902050d473bb2befa15714fb1d30a0991c15", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0dd37d6dd33a9c23351e6115ae8cdac7863bc7de", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/sched/fair.c"], "versions": [{"version": "4.14.322", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.291", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.251", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.188", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.150", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.42", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.7", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.14.322"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.19.291"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.4.251"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.4.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/32d937f94b7805d4c9028b8727a7d6241547da54"}, {"url": "https://git.kernel.org/stable/c/a5286f4655ce2fa28f477c0b957ea7f323fe2fab"}, {"url": "https://git.kernel.org/stable/c/cec1857b1ea5cc3ea2b600564f1c95d1a6f27ad1"}, {"url": "https://git.kernel.org/stable/c/6b0c79aa33075b34c3cdcea4132c0afb3fc42d68"}, {"url": "https://git.kernel.org/stable/c/3cb43222bab8ab328fc91ed30899b3df2efbccfd"}, {"url": "https://git.kernel.org/stable/c/78a5f711efceb37e32c48cd6b40addb671fea9cc"}, {"url": "https://git.kernel.org/stable/c/34eb902050d473bb2befa15714fb1d30a0991c15"}, {"url": "https://git.kernel.org/stable/c/0dd37d6dd33a9c23351e6115ae8cdac7863bc7de"}], "title": "sched/fair: Don't balance task to its current running CPU", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/fair: Don't balance task to its current running CPU\n\nWe've run into the case that the balancer tries to balance a migration\ndisabled task and trigger the warning in set_task_cpu() like below:\n\n ------------[ cut here ]------------\n WARNING: CPU: 7 PID: 0 at kernel/sched/core.c:3115 set_task_cpu+0x188/0x240\n Modules linked in: hclgevf xt_CHECKSUM ipt_REJECT nf_reject_ipv4 <...snip>\n CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G O 6.1.0-rc4+ #1\n Hardware name: Huawei TaiShan 2280 V2/BC82AMDC, BIOS 2280-V2 CS V5.B221.01 12/09/2021\n pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : set_task_cpu+0x188/0x240\n lr : load_balance+0x5d0/0xc60\n sp : ffff80000803bc70\n x29: ffff80000803bc70 x28: ffff004089e190e8 x27: ffff004089e19040\n x26: ffff007effcabc38 x25: 0000000000000000 x24: 0000000000000001\n x23: ffff80000803be84 x22: 000000000000000c x21: ffffb093e79e2a78\n x20: 000000000000000c x19: ffff004089e19040 x18: 0000000000000000\n x17: 0000000000001fad x16: 0000000000000030 x15: 0000000000000000\n x14: 0000000000000003 x13: 0000000000000000 x12: 0000000000000000\n x11: 0000000000000001 x10: 0000000000000400 x9 : ffffb093e4cee530\n x8 : 00000000fffffffe x7 : 0000000000ce168a x6 : 000000000000013e\n x5 : 00000000ffffffe1 x4 : 0000000000000001 x3 : 0000000000000b2a\n x2 : 0000000000000b2a x1 : ffffb093e6d6c510 x0 : 0000000000000001\n Call trace:\n set_task_cpu+0x188/0x240\n load_balance+0x5d0/0xc60\n rebalance_domains+0x26c/0x380\n _nohz_idle_balance.isra.0+0x1e0/0x370\n run_rebalance_domains+0x6c/0x80\n __do_softirq+0x128/0x3d8\n ____do_softirq+0x18/0x24\n call_on_irq_stack+0x2c/0x38\n do_softirq_own_stack+0x24/0x3c\n __irq_exit_rcu+0xcc/0xf4\n irq_exit_rcu+0x18/0x24\n el1_interrupt+0x4c/0xe4\n el1h_64_irq_handler+0x18/0x2c\n el1h_64_irq+0x74/0x78\n arch_cpu_idle+0x18/0x4c\n default_idle_call+0x58/0x194\n do_idle+0x244/0x2b0\n cpu_startup_entry+0x30/0x3c\n secondary_start_kernel+0x14c/0x190\n __secondary_switched+0xb0/0xb4\n ---[ end trace 0000000000000000 ]---\n\nFurther investigation shows that the warning is superfluous, the migration\ndisabled task is just going to be migrated to its current running CPU.\nThis is because that on load balance if the dst_cpu is not allowed by the\ntask, we'll re-select a new_dst_cpu as a candidate. If no task can be\nbalanced to dst_cpu we'll try to balance the task to the new_dst_cpu\ninstead. In this case when the migration disabled task is not on CPU it\nonly allows to run on its current CPU, load balance will select its\ncurrent CPU as new_dst_cpu and later triggers the warning above.\n\nThe new_dst_cpu is chosen from the env->dst_grpmask. Currently it\ncontains CPUs in sched_group_span() and if we have overlapped groups it's\npossible to run into this case. This patch makes env->dst_grpmask of\ngroup_balance_mask() which exclude any CPUs from the busiest group and\nsolve the issue. For balancing in a domain with no overlapped groups\nthe behaviour keeps same as before."}], "id": "CVE-2023-53215", "lastModified": "2025-09-15T15:22:27.090", "metrics": {}, "published": "2025-09-15T15:15:48.140", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0dd37d6dd33a9c23351e6115ae8cdac7863bc7de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/32d937f94b7805d4c9028b8727a7d6241547da54"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/34eb902050d473bb2befa15714fb1d30a0991c15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3cb43222bab8ab328fc91ed30899b3df2efbccfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b0c79aa33075b34c3cdcea4132c0afb3fc42d68"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78a5f711efceb37e32c48cd6b40addb671fea9cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5286f4655ce2fa28f477c0b957ea7f323fe2fab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cec1857b1ea5cc3ea2b600564f1c95d1a6f27ad1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: sched/fair: Don't balance task to its current running CPU", "id": "2395368", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395368"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53215", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "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": "2025-09-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53215\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53215\nhttps://lore.kernel.org/linux-cve-announce/2025091511-CVE-2023-53215-8895@gregkh/T"], "threat_severity": "Low"}