CVE-2025-68294

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-68294", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-16T14:48:05.293Z", "datePublished": "2025-12-16T15:06:14.177Z", "dateUpdated": "2026-08-05T12:10:41.250Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:10:41.250Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/net: ensure vectored buffer node import is tied to notification\n\nWhen support for vectored registered buffers was added, the import\nitself is using 'req' rather than the notification io_kiocb, sr->notif.\nFor non-vectored imports, sr->notif is correctly used. This is important\nas the lifetime of the two may be different. Use the correct io_kiocb\nfor the vectored buffer import."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires a local process to submit an IORING_OP_SENDMSG_ZC operation through io_uring; incoming network traffic alone cannot reach the vulnerable import path.\nAC:L - The attacker controls buffer registration, the vectored send, notification lifetime, and buffer unregistration or replacement. A corked, congested, or deliberately stalled socket can reliably keep the notification outstanding after the main request completes.\nPR:L - An ordinary unprivileged user can create an io_uring instance, register their own memory, and use TCP or UDP sockets without capabilities when io_uring is enabled under its default policy.\nUI:N - No action by another user is required after the attacker submits the operations and manipulates the registered-buffer lifetime.\nS:U - Any resulting kernel compromise is a conventional local privilege escalation within the host kernel's security authority, not a mandatory cross-scope escape.\nC:H - The premature unpin permits network transmission to continue reading pages after they have been freed or recycled, potentially disclosing arbitrary kernel or other-process memory to an attacker-controlled peer.\nI:H - The stale managed fragments can cause page-reference and allocator corruption when subsequently referenced or downgraded, providing a use-after-free-class primitive that can plausibly be developed into arbitrary memory modification or kernel code execution.\nA:H - Accessing or changing references on prematurely released pages can trigger kernel faults, allocator corruption, oopses, or a system panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["io_uring/net.c"], "versions": [{"version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246", "lessThan": "14459281e027f23b70885c1cc1032a71c0efd8d7", "status": "affected", "versionType": "git"}, {"version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246", "lessThan": "f6041803a831266a2a5a5b5af66f7de0845bcbf3", "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/net.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.17.11", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18", "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": "6.15", "versionEndExcluding": "6.17.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/14459281e027f23b70885c1cc1032a71c0efd8d7"}, {"url": "https://git.kernel.org/stable/c/f6041803a831266a2a5a5b5af66f7de0845bcbf3"}], "title": "io_uring/net: ensure vectored buffer node import is tied to notification", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["io_uring/net.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "14459281e027f23b70885c1cc1032a71c0efd8d7", "status": "affected", "version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246", "versionType": "git"}, {"lessThan": "f6041803a831266a2a5a5b5af66f7de0845bcbf3", "status": "affected", "version": "23371eac7d9a9bca5360cfb3eb3aa08648ee7246", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["io_uring/net.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.17.*", "status": "unaffected", "version": "6.17.11", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.18", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/net: ensure vectored buffer node import is tied to notification\n\nWhen support for vectored registered buffers was added, the import\nitself is using 'req' rather than the notification io_kiocb, sr->notif.\nFor non-vectored imports, sr->notif is correctly used. This is important\nas the lifetime of the two may be different. Use the correct io_kiocb\nfor the vectored buffer import."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nio_uring/net: asegurar que la importaci\u00f3n de nodos de b\u00fafer vectorizados est\u00e9 ligada a la notificaci\u00f3n\n\nCuando se a\u00f1adi\u00f3 soporte para b\u00faferes registrados vectorizados, la importaci\u00f3n en s\u00ed est\u00e1 usando 'req' en lugar del io_kiocb de notificaci\u00f3n, sr -> notif. Para importaciones no vectorizadas, sr -> notif se usa correctamente. Esto es importante ya que la vida \u00fatil de los dos puede ser diferente. Usar el io_kiocb correcto para la importaci\u00f3n de b\u00fafer vectorizado."}], "id": "CVE-2025-68294", "lastModified": "2026-10-14T16:10:00.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2025-12-16T16:16:08.303", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/14459281e027f23b70885c1cc1032a71c0efd8d7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f6041803a831266a2a5a5b5af66f7de0845bcbf3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: io_uring/net: ensure vectored buffer node import is tied to notification", "id": "2422837", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2422837"}, "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-2025-68294", "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": "2025-12-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-68294\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-68294\nhttps://lore.kernel.org/linux-cve-announce/2025121641-CVE-2025-68294-fcd2@gregkh/T"], "threat_severity": "Low"}

{}