{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-12T03:46:52.847","vulnerabilities":[{"cve":{"id":"CVE-2021-46927","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-02-27T10:15:07.410","lastModified":"2024-11-21T06:34:57.133","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert\n\nAfter commit 5b78ed24e8ec (\"mm/pagemap: add mmap_assert_locked()\nannotations to find_vma*()\"), the call to get_user_pages() will trigger\nthe mmap assert.\n\nstatic inline void mmap_assert_locked(struct mm_struct *mm)\n{\n\tlockdep_assert_held(&mm->mmap_lock);\n\tVM_BUG_ON_MM(!rwsem_is_locked(&mm->mmap_lock), mm);\n}\n\n[   62.521410] kernel BUG at include/linux/mmap_lock.h:156!\n...........................................................\n[   62.538938] RIP: 0010:find_vma+0x32/0x80\n...........................................................\n[   62.605889] Call Trace:\n[   62.608502]  <TASK>\n[   62.610956]  ? lock_timer_base+0x61/0x80\n[   62.614106]  find_extend_vma+0x19/0x80\n[   62.617195]  __get_user_pages+0x9b/0x6a0\n[   62.620356]  __gup_longterm_locked+0x42d/0x450\n[   62.623721]  ? finish_wait+0x41/0x80\n[   62.626748]  ? __kmalloc+0x178/0x2f0\n[   62.629768]  ne_set_user_memory_region_ioctl.isra.0+0x225/0x6a0 [nitro_enclaves]\n[   62.635776]  ne_enclave_ioctl+0x1cf/0x6d7 [nitro_enclaves]\n[   62.639541]  __x64_sys_ioctl+0x82/0xb0\n[   62.642620]  do_syscall_64+0x3b/0x90\n[   62.645642]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nUse get_user_pages_unlocked() when setting the enclave memory regions.\nThat's a similar pattern as mmap_read_lock() used together with\nget_user_pages()."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nitro_enclaves: use la llamada get_user_pages_unlocked() para manejar mmap afirmar. Después del commit 5b78ed24e8ec (\"mm/pagemap: agregue anotaciones mmap_assert_locked() a find_vma*()\"), la llamada a get_user_pages( ) activará la afirmación mmap. estático en línea void mmap_assert_locked(struct mm_struct *mm) { lockdep_assert_held(&amp;mm-&gt;mmap_lock); VM_BUG_ON_MM(!rwsem_is_locked(&amp;mm-&gt;mmap_lock), mm); } [62.521410] ¡ERROR del kernel en include/linux/mmap_lock.h:156! ................................................. ......... [ 62.538938] RIP: 0010:find_vma+0x32/0x80 ................................. ................................. [ 62.605889] Seguimiento de llamadas: [ 62.608502]  [ 62.610956] ? LOCK_TIMER_BASE+0x61/0x80 [62.614106] find_extend_vma+0x19/0x80 [62.617195] __get_user_pages+0x9b/0x6a0 [62.6203356] __guup_longter_locked+0x42d/0x450 [62.620356] terminar_esperar+0x41/0x80 [62.626748]? __kmalloc+0x178/0x2f0 [ 62.629768] ne_set_user_memory_region_ioctl.isra.0+0x225/0x6a0 [nitro_enclaves] [ 62.635776] ne_enclave_ioctl+0x1cf/0x6d7 [nitro_enclaves] [ 62.639541] __x64 _sys_ioctl+0x82/0xb0 [ 62.642620] do_syscall_64+0x3b/0x90 [ 62.645642] Entry_SYSCALL_64_after_hwframe+0x44/0xae Utilice get_user_pages_unlocked() al configurar las regiones de memoria del enclave. Es un patrón similar al mmap_read_lock() usado junto con get_user_pages()."}],"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-667"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.0","versionEndExcluding":"5.15.13","matchCriteriaId":"8CC64BCA-D219-487C-A123-4C470FE30AB2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}