{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-50032", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.069Z", "datePublished": "2024-10-21T19:39:34.435Z", "dateUpdated": "2024-11-05T09:53:50.810Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:53:50.810Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix rcuog wake-up from offline softirq\n\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\n\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\n\n WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\n Modules linked in: rcutorture torture\n CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\n Stopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120\n RIP: 0010:smp_call_function_single\n <IRQ>\n swake_up_one_online\n __call_rcu_nocb_wake\n __call_rcu_common\n ? rcu_torture_one_read\n call_timer_fn\n __run_timers\n run_timer_softirq\n handle_softirqs\n irq_exit_rcu\n ? tick_handle_periodic\n sysvec_apic_timer_interrupt\n </IRQ>\n\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/rcu/tree_nocb.h"], "versions": [{"version": "9b52ee18f6d2", "lessThan": "84a5feebba10", "status": "affected", "versionType": "git"}, {"version": "00a611229bfa", "lessThan": "e66b1e01f2eb", "status": "affected", "versionType": "git"}, {"version": "9139f93209d1", "lessThan": "f7345ccc62a4", "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/rcu/tree_nocb.h"], "versions": [{"version": "6.12-rc1", "status": "affected"}, {"version": "0", "lessThan": "6.12-rc1", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.57", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/84a5feebba10354c683983f5f1372a144225e4c2"}, {"url": "https://git.kernel.org/stable/c/e66b1e01f2eb3209d08122572f41f7838b79540d"}, {"url": "https://git.kernel.org/stable/c/f7345ccc62a4b880cf76458db5f320725f28e400"}], "title": "rcu/nocb: Fix rcuog wake-up from offline softirq", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-50032", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:25:57.159032Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:28:45.623Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-50032", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-10-22T13:25:57.159032Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:26:00.432Z"}}], "cna": {"title": "rcu/nocb: Fix rcuog wake-up from offline softirq", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "9b52ee18f6d2", "lessThan": "84a5feebba10", "versionType": "git"}, {"status": "affected", "version": "00a611229bfa", "lessThan": "e66b1e01f2eb", "versionType": "git"}, {"status": "affected", "version": "9139f93209d1", "lessThan": "f7345ccc62a4", "versionType": "git"}], "programFiles": ["kernel/rcu/tree_nocb.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12-rc1"}, {"status": "unaffected", "version": "0", "lessThan": "6.12-rc1", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.57", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.11.4", "versionType": "semver", "lessThanOrEqual": "6.11.*"}, {"status": "unaffected", "version": "6.12-rc3", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/rcu/tree_nocb.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/84a5feebba10354c683983f5f1372a144225e4c2"}, {"url": "https://git.kernel.org/stable/c/e66b1e01f2eb3209d08122572f41f7838b79540d"}, {"url": "https://git.kernel.org/stable/c/f7345ccc62a4b880cf76458db5f320725f28e400"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix rcuog wake-up from offline softirq\n\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\n\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\n\n WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\n Modules linked in: rcutorture torture\n CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\n Stopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120\n RIP: 0010:smp_call_function_single\n <IRQ>\n swake_up_one_online\n __call_rcu_nocb_wake\n __call_rcu_common\n ? rcu_torture_one_read\n call_timer_fn\n __run_timers\n run_timer_softirq\n handle_softirqs\n irq_exit_rcu\n ? tick_handle_periodic\n sysvec_apic_timer_interrupt\n </IRQ>\n\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:53:50.810Z"}}}, "cveMetadata": {"cveId": "CVE-2024-50032", "state": "PUBLISHED", "dateUpdated": "2024-11-05T09:53:50.810Z", "dateReserved": "2024-10-21T12:17:06.069Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-10-21T19:39:34.435Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "28067F77-C1B2-4A04-BA6B-2C4955E8853E", "versionEndExcluding": "6.6.57", "versionStartIncluding": "6.6.54", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B88D322F-6F03-45A1-8C58-9E45EAB64B13", "versionEndExcluding": "6.11", "versionStartIncluding": "6.10.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "72A93F71-1302-40DD-847E-3C6D29220EAE", "versionEndExcluding": "6.11.4", "versionStartIncluding": "6.11.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1.113:*:*:*:*:*:*:*", "matchCriteriaId": "81EA2611-0623-46DE-8378-F900B6B1EC79", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix rcuog wake-up from offline softirq\n\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\n\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\n\n WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\n Modules linked in: rcutorture torture\n CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\n Stopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120\n RIP: 0010:smp_call_function_single\n <IRQ>\n swake_up_one_online\n __call_rcu_nocb_wake\n __call_rcu_common\n ? rcu_torture_one_read\n call_timer_fn\n __run_timers\n run_timer_softirq\n handle_softirqs\n irq_exit_rcu\n ? tick_handle_periodic\n sysvec_apic_timer_interrupt\n </IRQ>\n\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rcu/nocb: Se ha corregido la activaci\u00f3n de rcuog desde un softirq sin conexi\u00f3n. Despu\u00e9s de que una CPU se haya desconectado y antes de que finalmente llame a rcutree_report_cpu_dead(), a\u00fan hay oportunidades para que se pongan en cola devoluciones de llamadas, por ejemplo, desde un softirq. Cuando eso sucede en NOCB, la activaci\u00f3n de rcuog se pospone a trav\u00e9s de una IPI a una CPU en l\u00ednea para no llamar al programador y correr el riesgo de armar el ancho de banda RT despu\u00e9s de que los temporizadores hr se hayan migrado y deshabilitado. Pero realizar una IPI sincronizada desde un softirq tiene errores, como se informa en el siguiente escenario: ADVERTENCIA: CPU: 1 PID: 26 en kernel/smp.c:633 smp_call_function_single M\u00f3dulos vinculados en: rcutorture torture CPU: 1 UID: 0 PID: 26 Comm: immigration/1 No contaminado 6.11.0-rc1-00012-g9139f93209d1 #1 Detenedor: multi_cpu_stop+0x0/0x320 &lt;- __stop_cpus+0xd0/0x120 RIP: 0010:smp_call_function_single swake_up_one_online __call_rcu_nocb_wake __call_rcu_common ? rcu_torture_one_read call_timer_fn __run_timers run_timer_softirq handle_softirqs irq_exit_rcu ? tick_handle_periodic sysvec_apic_timer_interrupt Solucione esto forzando la activaci\u00f3n diferida de rcuog a trav\u00e9s del temporizador NOCB cuando la CPU est\u00e9 fuera de l\u00ednea. La activaci\u00f3n real se realizar\u00e1 desde rcutree_report_cpu_dead()."}], "id": "CVE-2024-50032", "lastModified": "2024-10-25T15:34:22.353", "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"}]}, "published": "2024-10-21T20:15:16.417", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/84a5feebba10354c683983f5f1372a144225e4c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e66b1e01f2eb3209d08122572f41f7838b79540d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f7345ccc62a4b880cf76458db5f320725f28e400"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: rcu/nocb: Fix rcuog wake-up from offline softirq", "id": "2320592", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320592"}, "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-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nrcu/nocb: Fix rcuog wake-up from offline softirq\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\nWARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\nModules linked in: rcutorture torture\nCPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\nStopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120\nRIP: 0010:smp_call_function_single\n<IRQ>\nswake_up_one_online\n__call_rcu_nocb_wake\n__call_rcu_common\n? rcu_torture_one_read\ncall_timer_fn\n__run_timers\nrun_timer_softirq\nhandle_softirqs\nirq_exit_rcu\n? tick_handle_periodic\nsysvec_apic_timer_interrupt\n</IRQ>\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()."], "name": "CVE-2024-50032", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50032\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50032\nhttps://lore.kernel.org/linux-cve-announce/2024102131-CVE-2024-50032-e7ba@gregkh/T"], "threat_severity": "Moderate"}