cve-2024-36888
Vulnerability from cvelistv5
Published
2024-05-30 15:28
Modified
2024-12-19 09:01
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix selection of wake_cpu in kick_pool() With cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following kernel oops was observed: smp: Bringing up secondary CPUs ... smp: Brought up 1 node, 8 CPUs Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 0000000000000000 TEID: 0000000000000803 [..] Call Trace: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 select_task_rq_fair+0x29a/0x3b0 try_to_wake_up+0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 __do_softirq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 do_ext_irq+0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 start_kernel+0x3c4/0x5e0 startup_continue+0x3c/0x50 The crash is caused by calling arch_vcpu_is_preempted() for an offline CPU. To avoid this, select the cpu with cpumask_any_and_distribute() to mask __pod_cpumask with cpu_online_mask. In case no cpu is left in the pool, skip the assignment. tj: This doesn't fully fix the bug as CPUs can still go down between picking the target CPU and the wake call. Fixing that likely requires adding cpu_online() test to either the sched or s390 arch code. However, regardless of how that is fixed, workqueue shouldn't be picking a CPU which isn't online as that would result in unpredictable and worse behavior.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767Patch
Impacted products
Vendor Product Version
Linux Linux Version: 8639ecebc9b1796d7074751a350462f5e1c61cd4
Version: 8639ecebc9b1796d7074751a350462f5e1c61cd4
Version: 8639ecebc9b1796d7074751a350462f5e1c61cd4
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   Linux Linux Version: 6.6
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{
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               value: "In the Linux kernel, the following vulnerability has been resolved:\n\nworkqueue: Fix selection of wake_cpu in kick_pool()\n\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\nkernel oops was observed:\n\nsmp: Bringing up secondary CPUs ...\nsmp: Brought up 1 node, 8 CPUs\nUnable to handle kernel pointer dereference in virtual kernel address space\nFailing address: 0000000000000000 TEID: 0000000000000803\n[..]\n Call Trace:\narch_vcpu_is_preempted+0x12/0x80\nselect_idle_sibling+0x42/0x560\nselect_task_rq_fair+0x29a/0x3b0\ntry_to_wake_up+0x38e/0x6e0\nkick_pool+0xa4/0x198\n__queue_work.part.0+0x2bc/0x3a8\ncall_timer_fn+0x36/0x160\n__run_timers+0x1e2/0x328\n__run_timer_base+0x5a/0x88\nrun_timer_softirq+0x40/0x78\n__do_softirq+0x118/0x388\nirq_exit_rcu+0xc0/0xd8\ndo_ext_irq+0xae/0x168\next_int_handler+0xbe/0xf0\npsw_idle_exit+0x0/0xc\ndefault_idle_call+0x3c/0x110\ndo_idle+0xd4/0x158\ncpu_startup_entry+0x40/0x48\nrest_init+0xc6/0xc8\nstart_kernel+0x3c4/0x5e0\nstartup_continue+0x3c/0x50\n\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\nthe pool, skip the assignment.\n\ntj: This doesn't fully fix the bug as CPUs can still go down between picking\nthe target CPU and the wake call. Fixing that likely requires adding\ncpu_online() test to either the sched or s390 arch code. However, regardless\nof how that is fixed, workqueue shouldn't be picking a CPU which isn't\nonline as that would result in unpredictable and worse behavior.",
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         title: "workqueue: Fix selection of wake_cpu in kick_pool()",
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      assignerShortName: "Linux",
      cveId: "CVE-2024-36888",
      datePublished: "2024-05-30T15:28:56.214Z",
      dateReserved: "2024-05-30T15:25:07.065Z",
      dateUpdated: "2024-12-19T09:01:25.351Z",
      state: "PUBLISHED",
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         descriptions: "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix selection of wake_cpu in kick_pool()\\n\\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\\nkernel oops was observed:\\n\\nsmp: Bringing up secondary CPUs ...\\nsmp: Brought up 1 node, 8 CPUs\\nUnable to handle kernel pointer dereference in virtual kernel address space\\nFailing address: 0000000000000000 TEID: 0000000000000803\\n[..]\\n Call Trace:\\narch_vcpu_is_preempted+0x12/0x80\\nselect_idle_sibling+0x42/0x560\\nselect_task_rq_fair+0x29a/0x3b0\\ntry_to_wake_up+0x38e/0x6e0\\nkick_pool+0xa4/0x198\\n__queue_work.part.0+0x2bc/0x3a8\\ncall_timer_fn+0x36/0x160\\n__run_timers+0x1e2/0x328\\n__run_timer_base+0x5a/0x88\\nrun_timer_softirq+0x40/0x78\\n__do_softirq+0x118/0x388\\nirq_exit_rcu+0xc0/0xd8\\ndo_ext_irq+0xae/0x168\\next_int_handler+0xbe/0xf0\\npsw_idle_exit+0x0/0xc\\ndefault_idle_call+0x3c/0x110\\ndo_idle+0xd4/0x158\\ncpu_startup_entry+0x40/0x48\\nrest_init+0xc6/0xc8\\nstart_kernel+0x3c4/0x5e0\\nstartup_continue+0x3c/0x50\\n\\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\\nthe pool, skip the assignment.\\n\\ntj: This doesn't fully fix the bug as CPUs can still go down between picking\\nthe target CPU and the wake call. Fixing that likely requires adding\\ncpu_online() test to either the sched or s390 arch code. However, regardless\\nof how that is fixed, workqueue shouldn't be picking a CPU which isn't\\nonline as that would result in unpredictable and worse behavior.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: workqueue: Se corrigi\\u00f3 la selecci\\u00f3n de wake_cpu en kick_pool() Con cpu_possible_mask=0-63 y cpu_online_mask=0-7 se observaron los siguientes errores del kernel: smp: Apareciendo CPU secundarias... smp: abri\\u00f3 1 nodo, 8 CPU No se puede manejar la desreferencia del puntero del kernel en el espacio de direcciones virtual del kernel Direcci\\u00f3n fallida: 0000000000000000 TEID: 0000000000000803 [..] Seguimiento de llamadas: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 _rq_fair+0x29a/0x3b0 intenta_despertar_up +0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 irq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 hacer_ext_irq+ 0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 startup_continue+0x3c/0x50 El bloqueo se produce al llamar a arch_vcpu_is_preempted () para una CPU fuera de l\\u00ednea. Para evitar esto, seleccione la CPU con cpumask_any_and_distribute() para enmascarar __pod_cpumask con cpu_online_mask. En caso de que no quede ninguna CPU en el grupo, omita la tarea. tj: Esto no soluciona completamente el error ya que las CPU a\\u00fan pueden fallar entre la selecci\\u00f3n de la CPU de destino y la llamada de activaci\\u00f3n. Para solucionarlo, es probable que sea necesario agregar la prueba cpu_online() al c\\u00f3digo arch sched o s390. Sin embargo, independientemente de c\\u00f3mo se solucione, workqueue no deber\\u00eda elegir una CPU que no est\\u00e9 en l\\u00ednea, ya que eso resultar\\u00eda en un comportamiento peor e impredecible.\"}]",
         id: "CVE-2024-36888",
         lastModified: "2024-11-21T09:22:44.343",
         metrics: "{\"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 6.2, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.5, \"impactScore\": 3.6}]}",
         published: "2024-05-30T16:15:12.323",
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         sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         vulnStatus: "Awaiting Analysis",
         weaknesses: "[{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]",
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      nvd: "{\"cve\":{\"id\":\"CVE-2024-36888\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-30T16:15:12.323\",\"lastModified\":\"2025-04-01T18:34:43.207\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix selection of wake_cpu in kick_pool()\\n\\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\\nkernel oops was observed:\\n\\nsmp: Bringing up secondary CPUs ...\\nsmp: Brought up 1 node, 8 CPUs\\nUnable to handle kernel pointer dereference in virtual kernel address space\\nFailing address: 0000000000000000 TEID: 0000000000000803\\n[..]\\n Call Trace:\\narch_vcpu_is_preempted+0x12/0x80\\nselect_idle_sibling+0x42/0x560\\nselect_task_rq_fair+0x29a/0x3b0\\ntry_to_wake_up+0x38e/0x6e0\\nkick_pool+0xa4/0x198\\n__queue_work.part.0+0x2bc/0x3a8\\ncall_timer_fn+0x36/0x160\\n__run_timers+0x1e2/0x328\\n__run_timer_base+0x5a/0x88\\nrun_timer_softirq+0x40/0x78\\n__do_softirq+0x118/0x388\\nirq_exit_rcu+0xc0/0xd8\\ndo_ext_irq+0xae/0x168\\next_int_handler+0xbe/0xf0\\npsw_idle_exit+0x0/0xc\\ndefault_idle_call+0x3c/0x110\\ndo_idle+0xd4/0x158\\ncpu_startup_entry+0x40/0x48\\nrest_init+0xc6/0xc8\\nstart_kernel+0x3c4/0x5e0\\nstartup_continue+0x3c/0x50\\n\\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\\nthe pool, skip the assignment.\\n\\ntj: This doesn't fully fix the bug as CPUs can still go down between picking\\nthe target CPU and the wake call. Fixing that likely requires adding\\ncpu_online() test to either the sched or s390 arch code. However, regardless\\nof how that is fixed, workqueue shouldn't be picking a CPU which isn't\\nonline as that would result in unpredictable and worse behavior.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: workqueue: Se corrigió la selección de wake_cpu en kick_pool() Con cpu_possible_mask=0-63 y cpu_online_mask=0-7 se observaron los siguientes errores del kernel: smp: Apareciendo CPU secundarias... smp: abrió 1 nodo, 8 CPU No se puede manejar la desreferencia del puntero del kernel en el espacio de direcciones virtual del kernel Dirección fallida: 0000000000000000 TEID: 0000000000000803 [..] Seguimiento de llamadas: arch_vcpu_is_preempted+0x12/0x80 select_idle_sibling+0x42/0x560 _rq_fair+0x29a/0x3b0 intenta_despertar_up +0x38e/0x6e0 kick_pool+0xa4/0x198 __queue_work.part.0+0x2bc/0x3a8 call_timer_fn+0x36/0x160 __run_timers+0x1e2/0x328 __run_timer_base+0x5a/0x88 run_timer_softirq+0x40/0x78 irq+0x118/0x388 irq_exit_rcu+0xc0/0xd8 hacer_ext_irq+ 0xae/0x168 ext_int_handler+0xbe/0xf0 psw_idle_exit+0x0/0xc default_idle_call+0x3c/0x110 do_idle+0xd4/0x158 cpu_startup_entry+0x40/0x48 rest_init+0xc6/0xc8 startup_continue+0x3c/0x50 El bloqueo se produce al llamar a arch_vcpu_is_preempted () para una CPU fuera de línea. Para evitar esto, seleccione la CPU con cpumask_any_and_distribute() para enmascarar __pod_cpumask con cpu_online_mask. En caso de que no quede ninguna CPU en el grupo, omita la tarea. tj: Esto no soluciona completamente el error ya que las CPU aún pueden fallar entre la selección de la CPU de destino y la llamada de activación. Para solucionarlo, es probable que sea necesario agregar la prueba cpu_online() al código arch sched o s390. Sin embargo, independientemente de cómo se solucione, workqueue no debería elegir una CPU que no esté en línea, ya que eso resultaría en un comportamiento peor e impredecible.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":6.2,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6\",\"versionEndExcluding\":\"6.6.31\",\"matchCriteriaId\":\"E7C57DED-21B6-460F-B4F1-8916B9B7A32E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.8.10\",\"matchCriteriaId\":\"6A6B920C-8D8F-4130-86B4-AD334F4CF2E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"22BEDD49-2C6D-402D-9DBF-6646F6ECD10B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"52048DDA-FC5A-4363-95A0-A6357B4D7F8C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"A06B2CCF-3F43-4FA9-8773-C83C3F5764B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"F850DCEC-E08B-4317-A33B-D2DCF39F601B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.9:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"91326417-E981-482E-A5A3-28BC1327521B\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T03:43:49.849Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.2, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-36888\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-03T16:08:09.861765Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"8639ecebc9b1\", \"lessThan\": \"c57824d4fe07\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*\"], \"vendor\": \"linux\", \"product\": \"linux_kernel\", \"versions\": [{\"status\": \"affected\", \"version\": \"8639ecebc9b1\", \"lessThan\": \"6d559e70b3eb\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": 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\"unaffected\", \"version\": \"6.8.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/workqueue.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c57824d4fe07c2131f8c48687cbd5ee2be60c767\"}, {\"url\": \"https://git.kernel.org/stable/c/6d559e70b3eb6623935cbe7f94c1912c1099777b\"}, {\"url\": \"https://git.kernel.org/stable/c/57a01eafdcf78f6da34fad9ff075ed5dfdd9f420\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nworkqueue: Fix selection of wake_cpu in kick_pool()\\n\\nWith cpu_possible_mask=0-63 and cpu_online_mask=0-7 the following\\nkernel oops was observed:\\n\\nsmp: Bringing up secondary CPUs ...\\nsmp: Brought up 1 node, 8 CPUs\\nUnable to handle kernel pointer dereference in virtual kernel address space\\nFailing address: 0000000000000000 TEID: 0000000000000803\\n[..]\\n Call Trace:\\narch_vcpu_is_preempted+0x12/0x80\\nselect_idle_sibling+0x42/0x560\\nselect_task_rq_fair+0x29a/0x3b0\\ntry_to_wake_up+0x38e/0x6e0\\nkick_pool+0xa4/0x198\\n__queue_work.part.0+0x2bc/0x3a8\\ncall_timer_fn+0x36/0x160\\n__run_timers+0x1e2/0x328\\n__run_timer_base+0x5a/0x88\\nrun_timer_softirq+0x40/0x78\\n__do_softirq+0x118/0x388\\nirq_exit_rcu+0xc0/0xd8\\ndo_ext_irq+0xae/0x168\\next_int_handler+0xbe/0xf0\\npsw_idle_exit+0x0/0xc\\ndefault_idle_call+0x3c/0x110\\ndo_idle+0xd4/0x158\\ncpu_startup_entry+0x40/0x48\\nrest_init+0xc6/0xc8\\nstart_kernel+0x3c4/0x5e0\\nstartup_continue+0x3c/0x50\\n\\nThe crash is caused by calling arch_vcpu_is_preempted() for an offline\\nCPU. To avoid this, select the cpu with cpumask_any_and_distribute()\\nto mask __pod_cpumask with cpu_online_mask. In case no cpu is left in\\nthe pool, skip the assignment.\\n\\ntj: This doesn't fully fix the bug as CPUs can still go down between picking\\nthe target CPU and the wake call. Fixing that likely requires adding\\ncpu_online() test to either the sched or s390 arch code. However, regardless\\nof how that is fixed, workqueue shouldn't be picking a CPU which isn't\\nonline as that would result in unpredictable and worse behavior.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:27:31.704Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-36888\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:27:31.704Z\", \"dateReserved\": \"2024-05-30T15:25:07.065Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-30T15:28:56.214Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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