CVE-2021-46927
Vulnerability from cvelistv5
Published
2024-02-27 09:43
Modified
2024-11-04 11:56
Severity ?
EPSS score ?
Summary
nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert
References
{ "containers": { "adp": [ { "metrics": [ { "other": { "content": { "id": "CVE-2021-46927", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "timestamp": "2024-02-27T15:46:16.994467Z", "version": "2.0.3" }, "type": "ssvc" } } ], "providerMetadata": { "dateUpdated": "2024-07-05T17:22:00.781Z", "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP" }, "title": "CISA ADP Vulnrichment" }, { "providerMetadata": { "dateUpdated": "2024-08-04T05:17:42.860Z", "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE" }, "references": [ { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543" }, { "tags": [ "x_transferred" ], "url": "https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176" } ], "title": "CVE Program Container" } ], "cna": { "affected": [ { "defaultStatus": "unaffected", "product": "Linux", "programFiles": [ "drivers/virt/nitro_enclaves/ne_misc_dev.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "lessThan": "90d2beed5e75", "status": "affected", "version": "5b78ed24e8ec", "versionType": "git" }, { "lessThan": "3a0152b21952", "status": "affected", "version": "5b78ed24e8ec", "versionType": "git" } ] }, { "defaultStatus": "affected", "product": "Linux", "programFiles": [ "drivers/virt/nitro_enclaves/ne_misc_dev.c" ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [ { "status": "affected", "version": "5.15" }, { "lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver" }, { "lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.13", "versionType": "semver" }, { "lessThanOrEqual": "*", "status": "unaffected", "version": "5.16", "versionType": "original_commit_for_fix" } ] } ], "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(\u0026mm-\u003emmap_lock);\n\tVM_BUG_ON_MM(!rwsem_is_locked(\u0026mm-\u003emmap_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] \u003cTASK\u003e\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\u0027s a similar pattern as mmap_read_lock() used together with\nget_user_pages()." } ], "providerMetadata": { "dateUpdated": "2024-11-04T11:56:04.090Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/90d2beed5e753805c5eab656b8d48257638fe543" }, { "url": "https://git.kernel.org/stable/c/3a0152b219523227c2a62a0a122cf99608287176" } ], "title": "nitro_enclaves: Use get_user_pages_unlocked() call to handle mmap assert", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-46927", "datePublished": "2024-02-27T09:43:56.743Z", "dateReserved": "2024-02-25T13:45:52.720Z", "dateUpdated": "2024-11-04T11:56:04.090Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-46927\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-27T10:15:07.410\",\"lastModified\":\"2024-04-10T16:25:32.067\",\"vulnStatus\":\"Analyzed\",\"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(\u0026mm-\u003emmap_lock);\\n\\tVM_BUG_ON_MM(!rwsem_is_locked(\u0026mm-\u003emmap_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] \u003cTASK\u003e\\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\u0027s 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. Despu\u00e9s del commit 5b78ed24e8ec (\\\"mm/pagemap: agregue anotaciones mmap_assert_locked() a find_vma*()\\\"), la llamada a get_user_pages( ) activar\u00e1 la afirmaci\u00f3n mmap. est\u00e1tico en l\u00ednea void mmap_assert_locked(struct mm_struct *mm) { lockdep_assert_held(\u0026amp;mm-\u0026gt;mmap_lock); VM_BUG_ON_MM(!rwsem_is_locked(\u0026amp;mm-\u0026gt;mmap_lock), mm); } [62.521410] \u00a1ERROR 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 patr\u00f3n 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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"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\"]}]}}" } }
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Sightings
Author | Source | Type | Date |
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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.