CVE-2024-41083

{"id": "CVE-2024-41083", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-07-29T16:15:03.790", "references": [{"url": "https://git.kernel.org/stable/c/3473eb87afd402e415a8ca885b284ea0420dde25", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a81c98bfa40c11f8ea79b5a9b3f5fda73bfbb4d2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix netfs_page_mkwrite() to check folio->mapping is valid\n\nFix netfs_page_mkwrite() to check that folio->mapping is valid once it has\ntaken the folio lock (as filemap_page_mkwrite() does). Without this,\ngeneric/247 occasionally oopses with something like the following:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n\n RIP: 0010:trace_event_raw_event_netfs_folio+0x61/0xc0\n ...\n Call Trace:\n <TASK>\n ? __die_body+0x1a/0x60\n ? page_fault_oops+0x6e/0xa0\n ? exc_page_fault+0xc2/0xe0\n ? asm_exc_page_fault+0x22/0x30\n ? trace_event_raw_event_netfs_folio+0x61/0xc0\n trace_netfs_folio+0x39/0x40\n netfs_page_mkwrite+0x14c/0x1d0\n do_page_mkwrite+0x50/0x90\n do_pte_missing+0x184/0x200\n __handle_mm_fault+0x42d/0x500\n handle_mm_fault+0x121/0x1f0\n do_user_addr_fault+0x23e/0x3c0\n exc_page_fault+0xc2/0xe0\n asm_exc_page_fault+0x22/0x30\n\nThis is due to the invalidate_inode_pages2_range() issued at the end of the\nDIO write interfering with the mmap'd writes."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: corrija netfs_page_mkwrite() para verificar que folio-&gt;mapping sea v\u00e1lido. Corrija netfs_page_mkwrite() para verificar que folio-&gt;mapping sea v\u00e1lido una vez que haya tomado el bloqueo de folio (como filemap_page_mkwrite( ) hace). Sin esto, generic/247 ocasionalmente falla con algo como lo siguiente: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000000 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente RIP: 0010:trace_event_raw_event_netfs_folio +0x61/0xc0... Seguimiento de llamadas: ? __die_body+0x1a/0x60 ? page_fault_oops+0x6e/0xa0? exc_page_fault+0xc2/0xe0? asm_exc_page_fault+0x22/0x30? trace_event_raw_event_netfs_folio+0x61/0xc0 trace_netfs_folio+0x39/0x40 netfs_page_mkwrite+0x14c/0x1d0 do_page_mkwrite+0x50/0x90 do_pte_missing+0x184/0x200 __handle_mm_fault+0x42d/0x500 _fault+0x121/0x1f0 do_user_addr_fault+0x23e/0x3c0 exc_page_fault+0xc2/0xe0 asm_exc_page_fault+0x22/0x30 Esto se debe a que invalidate_inode_pages2_range() emitido al final de la escritura DIO interfiere con las escrituras mmap."}], "lastModified": "2024-08-26T14:23:35.083", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "01A4BD4E-FEF5-4966-9017-7AAE1629F735", "versionEndExcluding": "6.9.8", "versionStartIncluding": "6.8"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}