cve-2021-47462
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-12-19 07:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind() syzbot reported access to unitialized memory in mbind() [1] Issue came with commit bda420b98505 ("numa balancing: migrate on fault among multiple bound nodes") This commit added a new bit in MPOL_MODE_FLAGS, but only checked valid combination (MPOL_F_NUMA_BALANCING can only be used with MPOL_BIND) in do_set_mempolicy() This patch moves the check in sanitize_mpol_flags() so that it is also used by mbind() [1] BUG: KMSAN: uninit-value in __mpol_equal+0x567/0x590 mm/mempolicy.c:2260 __mpol_equal+0x567/0x590 mm/mempolicy.c:2260 mpol_equal include/linux/mempolicy.h:105 [inline] vma_merge+0x4a1/0x1e60 mm/mmap.c:1190 mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333 kernel_mbind mm/mempolicy.c:1483 [inline] __do_sys_mbind mm/mempolicy.c:1490 [inline] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was created at: slab_alloc_node mm/slub.c:3221 [inline] slab_alloc mm/slub.c:3230 [inline] kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235 mpol_new mm/mempolicy.c:293 [inline] do_mbind+0x912/0x15f0 mm/mempolicy.c:1289 kernel_mbind mm/mempolicy.c:1483 [inline] __do_sys_mbind mm/mempolicy.c:1490 [inline] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae ===================================================== Kernel panic - not syncing: panic_on_kmsan set ... CPU: 0 PID: 15049 Comm: syz-executor.0 Tainted: G B 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106 dump_stack+0x25/0x28 lib/dump_stack.c:113 panic+0x44f/0xdeb kernel/panic.c:232 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208 __mpol_equal+0x567/0x590 mm/mempolicy.c:2260 mpol_equal include/linux/mempolicy.h:105 [inline] vma_merge+0x4a1/0x1e60 mm/mmap.c:1190 mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333 kernel_mbind mm/mempolicy.c:1483 [inline] __do_sys_mbind mm/mempolicy.c:1490 [inline] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9Patch
Impacted products
Vendor Product Version
Linux Linux Version: bda420b985054a3badafef23807c4b4fa38a3dff
Version: bda420b985054a3badafef23807c4b4fa38a3dff
 Create a notification for this product.
   Linux Linux Version: 5.12
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
   containers: {
      adp: [
         {
            metrics: [
               {
                  other: {
                     content: {
                        id: "CVE-2021-47462",
                        options: [
                           {
                              Exploitation: "none",
                           },
                           {
                              Automatable: "no",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-05-22T19:48:07.390031Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            providerMetadata: {
               dateUpdated: "2024-06-04T17:13:24.847Z",
               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
            },
            title: "CISA ADP Vulnrichment",
         },
         {
            providerMetadata: {
               dateUpdated: "2024-08-04T05:39:59.432Z",
               orgId: "af854a3a-2127-422b-91ae-364da2661108",
               shortName: "CVE",
            },
            references: [
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9",
               },
               {
                  tags: [
                     "x_transferred",
                  ],
                  url: "https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c",
               },
            ],
            title: "CVE Program Container",
         },
      ],
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "mm/mempolicy.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9",
                     status: "affected",
                     version: "bda420b985054a3badafef23807c4b4fa38a3dff",
                     versionType: "git",
                  },
                  {
                     lessThan: "6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c",
                     status: "affected",
                     version: "bda420b985054a3badafef23807c4b4fa38a3dff",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "mm/mempolicy.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "5.12",
                  },
                  {
                     lessThan: "5.12",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.14.*",
                     status: "unaffected",
                     version: "5.14.15",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "5.15",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()\n\nsyzbot reported access to unitialized memory in mbind() [1]\n\nIssue came with commit bda420b98505 (\"numa balancing: migrate on fault\namong multiple bound nodes\")\n\nThis commit added a new bit in MPOL_MODE_FLAGS, but only checked valid\ncombination (MPOL_F_NUMA_BALANCING can only be used with MPOL_BIND) in\ndo_set_mempolicy()\n\nThis patch moves the check in sanitize_mpol_flags() so that it is also\nused by mbind()\n\n  [1]\n  BUG: KMSAN: uninit-value in __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\n   mpol_equal include/linux/mempolicy.h:105 [inline]\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\n   kernel_mbind mm/mempolicy.c:1483 [inline]\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n  Uninit was created at:\n   slab_alloc_node mm/slub.c:3221 [inline]\n   slab_alloc mm/slub.c:3230 [inline]\n   kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235\n   mpol_new mm/mempolicy.c:293 [inline]\n   do_mbind+0x912/0x15f0 mm/mempolicy.c:1289\n   kernel_mbind mm/mempolicy.c:1483 [inline]\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\n  =====================================================\n  Kernel panic - not syncing: panic_on_kmsan set ...\n  CPU: 0 PID: 15049 Comm: syz-executor.0 Tainted: G    B             5.15.0-rc2-syzkaller #0\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\n  Call Trace:\n   __dump_stack lib/dump_stack.c:88 [inline]\n   dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106\n   dump_stack+0x25/0x28 lib/dump_stack.c:113\n   panic+0x44f/0xdeb kernel/panic.c:232\n   kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186\n   __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\n   mpol_equal include/linux/mempolicy.h:105 [inline]\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\n   kernel_mbind mm/mempolicy.c:1483 [inline]\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\n   entry_SYSCALL_64_after_hwframe+0x44/0xae",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T07:42:52.249Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9",
            },
            {
               url: "https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c",
            },
         ],
         title: "mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2021-47462",
      datePublished: "2024-05-22T06:23:23.034Z",
      dateReserved: "2024-05-22T06:20:56.198Z",
      dateUpdated: "2024-12-19T07:42:52.249Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2021-47462\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:11.117\",\"lastModified\":\"2025-02-03T15:46:30.700\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()\\n\\nsyzbot reported access to unitialized memory in mbind() [1]\\n\\nIssue came with commit bda420b98505 (\\\"numa balancing: migrate on fault\\namong multiple bound nodes\\\")\\n\\nThis commit added a new bit in MPOL_MODE_FLAGS, but only checked valid\\ncombination (MPOL_F_NUMA_BALANCING can only be used with MPOL_BIND) in\\ndo_set_mempolicy()\\n\\nThis patch moves the check in sanitize_mpol_flags() so that it is also\\nused by mbind()\\n\\n  [1]\\n  BUG: KMSAN: uninit-value in __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   mpol_equal include/linux/mempolicy.h:105 [inline]\\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n  Uninit was created at:\\n   slab_alloc_node mm/slub.c:3221 [inline]\\n   slab_alloc mm/slub.c:3230 [inline]\\n   kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235\\n   mpol_new mm/mempolicy.c:293 [inline]\\n   do_mbind+0x912/0x15f0 mm/mempolicy.c:1289\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n  =====================================================\\n  Kernel panic - not syncing: panic_on_kmsan set ...\\n  CPU: 0 PID: 15049 Comm: syz-executor.0 Tainted: G    B             5.15.0-rc2-syzkaller #0\\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n  Call Trace:\\n   __dump_stack lib/dump_stack.c:88 [inline]\\n   dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106\\n   dump_stack+0x25/0x28 lib/dump_stack.c:113\\n   panic+0x44f/0xdeb kernel/panic.c:232\\n   kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186\\n   __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208\\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   mpol_equal include/linux/mempolicy.h:105 [inline]\\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: mm/mempolicy: no permitir MPOL_F_NUMA_BALANCING ilegal | MPOL_LOCAL en mbind() syzbot informó acceso a la memoria unificada en mbind() [1] El problema surgió con el commit bda420b98505 (\\\"equilibrio numa: migrar en caso de falla entre múltiples nodos vinculados\\\") Esta confirmación agregó un nuevo bit en MPOL_MODE_FLAGS, pero solo marcó que era válido combinación (MPOL_F_NUMA_BALANCING solo se puede usar con MPOL_BIND) en do_set_mempolicy() Este parche mueve la verificación en sanitize_mpol_flags() para que también sea usado por mbind() [1] ERROR: KMSAN: valor uninit en __mpol_equal+0x567/0x590 mm /mempolicy.c:2260 __mpol_equal+0x567/0x590 mm/mempolicy.c:2260 mpol_equal include/linux/mempolicy.h:105 [en línea] vma_merge+0x4a1/0x1e60 mm/mmap.c:1190 mbind_range+0xcc8/0x1e80 mm/ mempolicy.c:811 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333 kernel_mbind mm/mempolicy.c:1483 [en línea] __do_sys_mbind mm/mempolicy.c:1490 [en línea] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c: 1486 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common.c:51 [en línea] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 Entry_SYSCALL_64_after_hwframe+0 Unidad x44/0xae fue creado en: slab_alloc_node mm/slub.c:3221 [en línea] slab_alloc mm/slub.c:3230 [en línea] kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235 mpol_new mm/mempolicy.c:293 [en línea] do_mbind +0x912/0x15f0 mm/mempolicy.c:1289 kernel_mbind mm/mempolicy.c:1483 [en línea] __do_sys_mbind mm/mempolicy.c:1490 [en línea] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486 __x64_sys_mbind+0 x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common.c:51 [en línea] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 Entry_SYSCALL_64_after_hwframe+0x44/0xae ======= =============================================== Pánico del kernel - no sincronización: pánico_on_kmsan set... CPU: 0 PID: 15049 Comm: syz-executor.0 Contaminado: GB 5.15.0-rc2-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/ Seguimiento de llamadas de 2011: __dump_stack lib/dump_stack.c:88 [en línea] dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106 dump_stack+0x25/0x28 lib/dump_stack.c:113 pánico+0x44f/0xdeb kernel/panic.c: 232 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208 __mpol_equal+0x567/0x590 mm/mempolicy.c:2260 mpol_equal include/linux/mempolicy.h: 105 [en línea] vma_merge+0x4a1/0x1e60 mm/mmap.c:1190 mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811 do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333 kernel_mbind mm/mempolicy.c:1483 [en línea ] __do_sys_mbind mm/mempolicy.c:1490 [en línea] __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486 __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486 do_syscall_x64 arch/x86/entry/common. c:51 [en línea ] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 Entry_SYSCALL_64_after_hwframe+0x44/0xae\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.14.15\",\"matchCriteriaId\":\"CFEAA14C-4860-49B1-9532-8AFC5E1BDEF5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"60134C3A-06E4-48C1-B04F-2903732A4E56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"0460DA88-8FE1-46A2-9DDA-1F1ABA552E71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"AF55383D-4DF2-45DC-93F7-571F4F978EAB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"EBD45831-4B79-42BC-ABC0-86870F0DEA89\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.432Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47462\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-22T19:48:07.390031Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-22T19:48:15.511Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"mm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"bda420b98505\", \"lessThan\": \"9ee4e9ae98f1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bda420b98505\", \"lessThan\": \"6d2aec9e123b\", \"versionType\": \"git\"}], \"programFiles\": [\"mm/mempolicy.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.14.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"mm/mempolicy.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9ee4e9ae98f1f262d6fae0d266cfdf3ba2c321d9\"}, {\"url\": \"https://git.kernel.org/stable/c/6d2aec9e123bb9c49cb5c7fc654f25f81e688e8c\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/mempolicy: do not allow illegal MPOL_F_NUMA_BALANCING | MPOL_LOCAL in mbind()\\n\\nsyzbot reported access to unitialized memory in mbind() [1]\\n\\nIssue came with commit bda420b98505 (\\\"numa balancing: migrate on fault\\namong multiple bound nodes\\\")\\n\\nThis commit added a new bit in MPOL_MODE_FLAGS, but only checked valid\\ncombination (MPOL_F_NUMA_BALANCING can only be used with MPOL_BIND) in\\ndo_set_mempolicy()\\n\\nThis patch moves the check in sanitize_mpol_flags() so that it is also\\nused by mbind()\\n\\n  [1]\\n  BUG: KMSAN: uninit-value in __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   mpol_equal include/linux/mempolicy.h:105 [inline]\\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n\\n  Uninit was created at:\\n   slab_alloc_node mm/slub.c:3221 [inline]\\n   slab_alloc mm/slub.c:3230 [inline]\\n   kmem_cache_alloc+0x751/0xff0 mm/slub.c:3235\\n   mpol_new mm/mempolicy.c:293 [inline]\\n   do_mbind+0x912/0x15f0 mm/mempolicy.c:1289\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\\n  =====================================================\\n  Kernel panic - not syncing: panic_on_kmsan set ...\\n  CPU: 0 PID: 15049 Comm: syz-executor.0 Tainted: G    B             5.15.0-rc2-syzkaller #0\\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\\n  Call Trace:\\n   __dump_stack lib/dump_stack.c:88 [inline]\\n   dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106\\n   dump_stack+0x25/0x28 lib/dump_stack.c:113\\n   panic+0x44f/0xdeb kernel/panic.c:232\\n   kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186\\n   __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208\\n   __mpol_equal+0x567/0x590 mm/mempolicy.c:2260\\n   mpol_equal include/linux/mempolicy.h:105 [inline]\\n   vma_merge+0x4a1/0x1e60 mm/mmap.c:1190\\n   mbind_range+0xcc8/0x1e80 mm/mempolicy.c:811\\n   do_mbind+0xf42/0x15f0 mm/mempolicy.c:1333\\n   kernel_mbind mm/mempolicy.c:1483 [inline]\\n   __do_sys_mbind mm/mempolicy.c:1490 [inline]\\n   __se_sys_mbind+0x437/0xb80 mm/mempolicy.c:1486\\n   __x64_sys_mbind+0x19d/0x200 mm/mempolicy.c:1486\\n   do_syscall_x64 arch/x86/entry/common.c:51 [inline]\\n   do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:06:24.798Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47462\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T12:06:24.798Z\", \"dateReserved\": \"2024-05-22T06:20:56.198Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-22T06:23:23.034Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.