{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-21T23:58:23.452","vulnerabilities":[{"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"]}]}}]}