{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-38256", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.997Z", "datePublished": "2025-07-09T10:42:33.819Z", "dateUpdated": "2025-07-28T04:16:20.912Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-07-28T04:16:20.912Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: fix folio unpinning\n\nsyzbot complains about an unmapping failure:\n\n[ 108.070381][ T14] kernel BUG at mm/gup.c:71!\n[ 108.070502][ T14] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n[ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025\n[ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work\n[ 108.174205][ T14] Call trace:\n[ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P)\n[ 108.178138][ T14] unpin_user_page+0x80/0x10c\n[ 108.180189][ T14] io_release_ubuf+0x84/0xf8\n[ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c\n[ 108.184345][ T14] io_rsrc_data_free+0x148/0x298\n[ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0\n[ 108.188991][ T14] io_ring_ctx_free+0x48/0x480\n[ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8\n[ 108.193207][ T14] process_one_work+0x7e8/0x155c\n[ 108.195431][ T14] worker_thread+0x958/0xed8\n[ 108.197561][ T14] kthread+0x5fc/0x75c\n[ 108.199362][ T14] ret_from_fork+0x10/0x20\n\nWe can pin a tail page of a folio, but then io_uring will try to unpin\nthe head page of the folio. While it should be fine in terms of keeping\nthe page actually alive, mm folks say it's wrong and triggers a debug\nwarning. Use unpin_user_folio() instead of unpin_user_page*.\n\n[axboe: adapt to current tree, massage commit message]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/rsrc.c"], "versions": [{"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "53fd75f25b223878b5fff14932e3a22f42b54f77", "status": "affected", "versionType": "git"}, {"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "11e7b7369e655e6131387b174218d7fa9557b3da", "status": "affected", "versionType": "git"}, {"version": "a8edbb424b1391b077407c75d8f5d2ede77aa70d", "lessThan": "5afb4bf9fc62d828647647ec31745083637132e4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/rsrc.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.36", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.5", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.15.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/53fd75f25b223878b5fff14932e3a22f42b54f77"}, {"url": "https://git.kernel.org/stable/c/11e7b7369e655e6131387b174218d7fa9557b3da"}, {"url": "https://git.kernel.org/stable/c/5afb4bf9fc62d828647647ec31745083637132e4"}], "title": "io_uring/rsrc: fix folio unpinning", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: fix folio unpinning\n\nsyzbot complains about an unmapping failure:\n\n[ 108.070381][ T14] kernel BUG at mm/gup.c:71!\n[ 108.070502][ T14] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n[ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025\n[ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work\n[ 108.174205][ T14] Call trace:\n[ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P)\n[ 108.178138][ T14] unpin_user_page+0x80/0x10c\n[ 108.180189][ T14] io_release_ubuf+0x84/0xf8\n[ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c\n[ 108.184345][ T14] io_rsrc_data_free+0x148/0x298\n[ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0\n[ 108.188991][ T14] io_ring_ctx_free+0x48/0x480\n[ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8\n[ 108.193207][ T14] process_one_work+0x7e8/0x155c\n[ 108.195431][ T14] worker_thread+0x958/0xed8\n[ 108.197561][ T14] kthread+0x5fc/0x75c\n[ 108.199362][ T14] ret_from_fork+0x10/0x20\n\nWe can pin a tail page of a folio, but then io_uring will try to unpin\nthe head page of the folio. While it should be fine in terms of keeping\nthe page actually alive, mm folks say it's wrong and triggers a debug\nwarning. Use unpin_user_folio() instead of unpin_user_page*.\n\n[axboe: adapt to current tree, massage commit message]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring/rsrc: se corrige la desanclaje de folio. syzbot se queja de un error de desasignaci\u00f3n: [ 108.070381][ T14] \u00a1ERROR del kernel en mm/gup.c:71! [ 108.070502][ T14] Error interno: Ups - ERROR: 00000000f2000800 [#1] SMP [ 108.123672][ T14] Hardware name: QEMU KVM Virtual Machine, BIOS edk2-20250221-8.fc42 02/21/2025 [ 108.127458][ T14] Workqueue: iou_exit io_ring_exit_work [ 108.174205][ T14] Call trace: [ 108.175649][ T14] sanity_check_pinned_pages+0x7cc/0x7d0 (P) [ 108.178138][ T14] unpin_user_page+0x80/0x10c [ 108.180189][ T14] io_release_ubuf+0x84/0xf8 [ 108.182196][ T14] io_free_rsrc_node+0x250/0x57c [ 108.184345][ T14] io_rsrc_data_free+0x148/0x298 [ 108.186493][ T14] io_sqe_buffers_unregister+0x84/0xa0 [ 108.188991][ T14] io_ring_ctx_free+0x48/0x480 [ 108.191057][ T14] io_ring_exit_work+0x764/0x7d8 [ 108.193207][ T14] process_one_work+0x7e8/0x155c [ 108.195431][ T14] worker_thread+0x958/0xed8 [ 108.197561][ T14] kthread+0x5fc/0x75c [ 108.199362][ T14] ret_from_fork+0x10/0x20 Podemos anclar la p\u00e1gina final de un folio, pero entonces io_uring intentar\u00e1 desanclar la p\u00e1gina principal. Si bien esto deber\u00eda funcionar correctamente para mantener la p\u00e1gina activa, los usuarios de mm indican que es incorrecto y genera una advertencia de depuraci\u00f3n. Use unpin_user_folio() en lugar de unpin_user_page*. [axboe: adaptar al \u00e1rbol actual, modificar el mensaje de confirmaci\u00f3n]"}], "id": "CVE-2025-38256", "lastModified": "2025-07-10T13:17:30.017", "metrics": {}, "published": "2025-07-09T11:15:27.880", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/11e7b7369e655e6131387b174218d7fa9557b3da"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/53fd75f25b223878b5fff14932e3a22f42b54f77"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5afb4bf9fc62d828647647ec31745083637132e4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: io_uring/rsrc: fix folio unpinning", "id": "2378991", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2378991"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-38256", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "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": "2025-07-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38256\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38256\nhttps://lore.kernel.org/linux-cve-announce/2025070935-CVE-2025-38256-01cc@gregkh/T"], "threat_severity": "Moderate"}