{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-56612", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:06.013Z", "datePublished": "2024-12-27T14:51:17.150Z", "dateUpdated": "2025-01-20T06:24:09.114Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-01-20T06:24:09.114Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: handle NULL pages in unpin_user_pages()\n\nThe recent addition of \"pofs\" (pages or folios) handling to gup has a\nflaw: it assumes that unpin_user_pages() handles NULL pages in the pages**\narray. That's not the case, as I discovered when I ran on a new\nconfiguration on my test machine.\n\nFix this by skipping NULL pages in unpin_user_pages(), just like\nunpin_folios() already does.\n\nDetails: when booting on x86 with \"numa=fake=2 movablecore=4G\" on Linux\n6.12, and running this:\n\n tools/testing/selftests/mm/gup_longterm\n\n...I get the following crash:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nRIP: 0010:sanity_check_pinned_pages+0x3a/0x2d0\n...\nCall Trace:\n <TASK>\n ? __die_body+0x66/0xb0\n ? page_fault_oops+0x30c/0x3b0\n ? do_user_addr_fault+0x6c3/0x720\n ? irqentry_enter+0x34/0x60\n ? exc_page_fault+0x68/0x100\n ? asm_exc_page_fault+0x22/0x30\n ? sanity_check_pinned_pages+0x3a/0x2d0\n unpin_user_pages+0x24/0xe0\n check_and_migrate_movable_pages_or_folios+0x455/0x4b0\n __gup_longterm_locked+0x3bf/0x820\n ? mmap_read_lock_killable+0x12/0x50\n ? __pfx_mmap_read_lock_killable+0x10/0x10\n pin_user_pages+0x66/0xa0\n gup_test_ioctl+0x358/0xb20\n __se_sys_ioctl+0x6b/0xc0\n do_syscall_64+0x7b/0x150\n entry_SYSCALL_64_after_hwframe+0x76/0x7e"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/gup.c"], "versions": [{"version": "94efde1d15399f5c88e576923db9bcd422d217f2", "lessThan": "69d319450d1c651f3b05cd820ff285fdd810c032", "status": "affected", "versionType": "git"}, {"version": "94efde1d15399f5c88e576923db9bcd422d217f2", "lessThan": "a1268be280d8e484ab3606d7476edd0f14bb9961", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/gup.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/69d319450d1c651f3b05cd820ff285fdd810c032"}, {"url": "https://git.kernel.org/stable/c/a1268be280d8e484ab3606d7476edd0f14bb9961"}], "title": "mm/gup: handle NULL pages in unpin_user_pages()", "x_generator": {"engine": "bippy-5f407fcff5a0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2AF25791-E5D9-498F-AEA3-261AE0D30C3C", "versionEndExcluding": "6.12.5", "versionStartIncluding": "6.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/gup: handle NULL pages in unpin_user_pages()\n\nThe recent addition of \"pofs\" (pages or folios) handling to gup has a\nflaw: it assumes that unpin_user_pages() handles NULL pages in the pages**\narray. That's not the case, as I discovered when I ran on a new\nconfiguration on my test machine.\n\nFix this by skipping NULL pages in unpin_user_pages(), just like\nunpin_folios() already does.\n\nDetails: when booting on x86 with \"numa=fake=2 movablecore=4G\" on Linux\n6.12, and running this:\n\n tools/testing/selftests/mm/gup_longterm\n\n...I get the following crash:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nRIP: 0010:sanity_check_pinned_pages+0x3a/0x2d0\n...\nCall Trace:\n <TASK>\n ? __die_body+0x66/0xb0\n ? page_fault_oops+0x30c/0x3b0\n ? do_user_addr_fault+0x6c3/0x720\n ? irqentry_enter+0x34/0x60\n ? exc_page_fault+0x68/0x100\n ? asm_exc_page_fault+0x22/0x30\n ? sanity_check_pinned_pages+0x3a/0x2d0\n unpin_user_pages+0x24/0xe0\n check_and_migrate_movable_pages_or_folios+0x455/0x4b0\n __gup_longterm_locked+0x3bf/0x820\n ? mmap_read_lock_killable+0x12/0x50\n ? __pfx_mmap_read_lock_killable+0x10/0x10\n pin_user_pages+0x66/0xa0\n gup_test_ioctl+0x358/0xb20\n __se_sys_ioctl+0x6b/0xc0\n do_syscall_64+0x7b/0x150\n entry_SYSCALL_64_after_hwframe+0x76/0x7e"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/gup: gestionar p\u00e1ginas NULL en unpin_user_pages() La reciente incorporaci\u00f3n dla gesti\u00f3n de \"pofs\" (p\u00e1ginas o folios) a gup tiene un defecto: supone que unpin_user_pages() gestiona p\u00e1ginas NULL en la matriz pages**. Ese no es el caso, como descubr\u00ed cuando ejecut\u00e9 una nueva configuraci\u00f3n en mi m\u00e1quina de prueba. Solucione esto omitiendo las p\u00e1ginas NULL en unpin_user_pages(), tal como ya lo hace unpin_folios(). Detalles: al arrancar en x86 con \"numa=fake=2 movablecore=4G\" en Linux 6.12, y ejecutar esto: tools/testing/selftests/mm/gup_longterm ... obtengo el siguiente fallo: ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000008 RIP: 0010:sanity_check_pinned_pages+0x3a/0x2d0 ... Seguimiento de llamadas: ? __die_body+0x66/0xb0 ? page_fault_oops+0x30c/0x3b0 ? do_user_addr_fault+0x6c3/0x720 ? irqentry_enter+0x34/0x60 ? exc_page_fault+0x68/0x100 ? asm_exc_page_fault+0x22/0x30 ? comprobaci\u00f3n de integridad de p\u00e1ginas fijadas+0x3a/0x2d0 desanclar p\u00e1ginas de usuario+0x24/0xe0 comprobar y migrar p\u00e1ginas o folios movibles+0x455/0x4b0 __gup_longterm_locked+0x3bf/0x820 ? mmap_read_lock_killable+0x12/0x50 ? __pfx_mmap_read_lock_killable+0x10/0x10 pin_usuario_p\u00e1ginas+0x66/0xa0 gup_test_ioctl+0x358/0xb20 __se_sys_ioctl+0x6b/0xc0 hacer_llamada_al_sistema_64+0x7b/0x150 entrada_SYSCALL_64_despu\u00e9s_de_hwframe+0x76/0x7e"}], "id": "CVE-2024-56612", "lastModified": "2025-01-08T16:44:20.777", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-12-27T15:15:20.687", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/69d319450d1c651f3b05cd820ff285fdd810c032"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a1268be280d8e484ab3606d7476edd0f14bb9961"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm/gup: handle NULL pages in unpin_user_pages()", "id": "2334462", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2334462"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm/gup: handle NULL pages in unpin_user_pages()\nThe recent addition of \"pofs\" (pages or folios) handling to gup has a\nflaw: it assumes that unpin_user_pages() handles NULL pages in the pages**\narray. That's not the case, as I discovered when I ran on a new\nconfiguration on my test machine.\nFix this by skipping NULL pages in unpin_user_pages(), just like\nunpin_folios() already does.\nDetails: when booting on x86 with \"numa=fake=2 movablecore=4G\" on Linux\n6.12, and running this:\ntools/testing/selftests/mm/gup_longterm\n...I get the following crash:\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nRIP: 0010:sanity_check_pinned_pages+0x3a/0x2d0\n...\nCall Trace:\n<TASK>\n? __die_body+0x66/0xb0\n? page_fault_oops+0x30c/0x3b0\n? do_user_addr_fault+0x6c3/0x720\n? irqentry_enter+0x34/0x60\n? exc_page_fault+0x68/0x100\n? asm_exc_page_fault+0x22/0x30\n? sanity_check_pinned_pages+0x3a/0x2d0\nunpin_user_pages+0x24/0xe0\ncheck_and_migrate_movable_pages_or_folios+0x455/0x4b0\n__gup_longterm_locked+0x3bf/0x820\n? mmap_read_lock_killable+0x12/0x50\n? __pfx_mmap_read_lock_killable+0x10/0x10\npin_user_pages+0x66/0xa0\ngup_test_ioctl+0x358/0xb20\n__se_sys_ioctl+0x6b/0xc0\ndo_syscall_64+0x7b/0x150\nentry_SYSCALL_64_after_hwframe+0x76/0x7e"], "name": "CVE-2024-56612", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-56612\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-56612\nhttps://lore.kernel.org/linux-cve-announce/2024122707-CVE-2024-56612-a24e@gregkh/T"], "threat_severity": "Moderate"}