{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-52582", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-02T21:55:42.569Z", "datePublished": "2024-03-02T21:59:48.490Z", "dateUpdated": "2026-05-11T19:29:41.298Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:29:41.298Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 > /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin > /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n netfs_subreq_terminated+0x32b/0x610 [netfs]\n nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n nfs_read_completion+0x2f9/0x330 [nfs]\n rpc_free_task+0x72/0xa0 [sunrpc]\n rpc_async_release+0x46/0x70 [sunrpc]\n process_one_work+0x3bd/0x710\n worker_thread+0x89/0x610\n kthread+0x181/0x1c0\n ret_from_fork+0x29/0x50"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c"], "versions": [{"version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "df9950d37df113db59495fa09d060754366a2b7c", "status": "affected", "versionType": "git"}, {"version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "d9f5537479d4ec97ea92ff24e81a517d5772581a", "status": "affected", "versionType": "git"}, {"version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "df1c357f25d808e30b216188330e708e09e1a412", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_read.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": 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Vulnrichment"}], "cna": {"title": "netfs: Only call folio_start_fscache() one time for each folio", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "df9950d37df113db59495fa09d060754366a2b7c", "versionType": "git"}, {"status": "affected", "version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "d9f5537479d4ec97ea92ff24e81a517d5772581a", "versionType": "git"}, {"status": "affected", "version": "3d3c95046742e4eebaa4b891b0b01cbbed94ebbd", "lessThan": "df1c357f25d808e30b216188330e708e09e1a412", "versionType": "git"}], "programFiles": ["fs/netfs/buffered_read.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"status": "unaffected", "version": 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clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 > /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin > /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "22500F70-0E58-4032-89D2-3152759A8C0A", "versionEndExcluding": "6.1.56", "versionStartIncluding": "5.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "870FC772-173A-4A0F-B1AF-7976AD6057D3", "versionEndExcluding": "6.5.6", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:*", "matchCriteriaId": "84267A4F-DBC2-444F-B41D-69E15E1BEC97", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:*", "matchCriteriaId": "FB440208-241C-4246-9A83-C1715C0DAA6C", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n 1+0 records in\n 1+0 records out\n 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n echo 3 > /proc/sys/vm/drop_caches\n cat /mnt/nfs/file.bin > /dev/null\n\nwill trigger an oops similar to the following:\n\n page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n ------------[ cut here ]------------\n kernel BUG at include/linux/netfs.h:44!\n ...\n CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n ...\n RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n ...\n Call Trace:\n netfs_rreq_assess+0x497/0x660 [netfs]\n netfs_subreq_terminated+0x32b/0x610 [netfs]\n nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n nfs_read_completion+0x2f9/0x330 [nfs]\n rpc_free_task+0x72/0xa0 [sunrpc]\n rpc_async_release+0x46/0x70 [sunrpc]\n process_one_work+0x3bd/0x710\n worker_thread+0x89/0x610\n kthread+0x181/0x1c0\n ret_from_fork+0x29/0x50"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: solo llame a folio_start_fscache() una vez para cada folio. Si un sistema de archivos de red que utiliza netfs implementa una funci\u00f3n abrazadera_longitud(), puede establecer longitudes de subsolicitud m\u00e1s peque\u00f1as que el tama\u00f1o de una p\u00e1gina. Cuando recorremos las publicaciones en netfs_rreq_unlock_folios() para configurar las publicaciones que se reescribir\u00e1n, debemos asegurarnos de llamar solo a folio_start_fscache() una vez para cada publicaci\u00f3n. De lo contrario, este caso de prueba simple: mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count= 1 1+0 registros en 1+0 registros en salida 4096 bytes (4,1 kB, 4,0 KiB) copiados, 0,0126359 s, 324 kB/s echo 3 > /proc/sys/vm/drop_caches cat /mnt/nfs/file.bin > /dev/null desencadenar\u00e1 un error similar al siguiente: p\u00e1gina volcada porque: VM_BUG_ON_FOLIO(folio_test_private_2(folio)) ------------[ cortar aqu\u00ed ]---------- -- \u00a1ERROR del kernel en include/linux/netfs.h:44! ... CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: cargado No contaminado 6.4.0-rc5 ... RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs] ... Seguimiento de llamadas: netfs_rreq_assess+0x497 /0x660 [netfs] netfs_subreq_terminate+0x32b/0x610 [netfs] nfs_netfs_read_completion+0x14e/0x1a0 [nfs] nfs_read_completion+0x2f9/0x330 [nfs] rpc_free_task+0x72/0xa0 [sunrpc] rpc_a sync_release+0x46/0x70 [sunrpc] proceso_one_work+0x3bd/0x710 hilo_trabajador+0x89/0x610 kthread+0x181/0x1c0 ret_from_fork+0x29/0x50"}], "id": "CVE-2023-52582", "lastModified": "2025-01-16T17:33:18.490", "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": "2024-03-02T22:15:49.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: netfs: improper loop in netfs_rreq_unlock_folios()", "id": "2267762", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267762"}, "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-606", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnetfs: Only call folio_start_fscache() one time for each folio\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\nOtherwise, this simple testcase:\nmount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\ndd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n1+0 records in\n1+0 records out\n4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\necho 3 > /proc/sys/vm/drop_caches\ncat /mnt/nfs/file.bin > /dev/null\nwill trigger an oops similar to the following:\npage dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n------------[ cut here ]------------\nkernel BUG at include/linux/netfs.h:44!\n...\nCPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n...\nRIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n...\nCall Trace:\nnetfs_rreq_assess+0x497/0x660 [netfs]\nnetfs_subreq_terminated+0x32b/0x610 [netfs]\nnfs_netfs_read_completion+0x14e/0x1a0 [nfs]\nnfs_read_completion+0x2f9/0x330 [nfs]\nrpc_free_task+0x72/0xa0 [sunrpc]\nrpc_async_release+0x46/0x70 [sunrpc]\nprocess_one_work+0x3bd/0x710\nworker_thread+0x89/0x610\nkthread+0x181/0x1c0\nret_from_fork+0x29/0x50", "An improper loop flaw was found in netfs_rreq_unlock_folios() in the Linux kernel. This may lead to compromised Availability."], "name": "CVE-2023-52582", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52582\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52582\nhttps://lore.kernel.org/linux-cve-announce/2024030258-CVE-2023-52582-07c8@gregkh/T/#u"], "threat_severity": "Moderate"}

{}