CVE-2023-0240

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "packageName": "io_uring", "product": "Linux Kernel", "repo": "https://git.kernel.org", "vendor": "Linux", "versions": [{"lessThanOrEqual": "5.10.161", "status": "affected", "version": "5.10", "versionType": "custom"}]}], "source": "cve-coordination@google.com"}, {"affectedData": [{"cpes": ["cpe:2.3:o:linux:linux_kernel:5.10:-:*:*:*:*:*:*"], "defaultStatus": "unaffected", "product": "linux_kernel", "vendor": "linux", "versions": [{"lessThanOrEqual": "5.10.161", "status": "affected", "version": "5.10", "versionType": "custom"}]}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D61CA62B-157A-4415-B8FD-7C3C1208315D", "versionEndExcluding": "5.10", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.\n\nIn the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161."}, {"lang": "es", "value": "Hay un error l\u00f3gico en la implementaci\u00f3n de io_uring que puede usarse para desencadenar una vulnerabilidad use-after-free que conduce a una escalada de privilegios. En la funci\u00f3n io_prep_async_work, la suposici\u00f3n de que la \u00faltima llamada a io_grab_identity no puede devolver falso no es cierta y, en este caso, la funci\u00f3n utilizar\u00e1 la identidad init_cred o las solicitudes vinculadas anteriores para realizar operaciones en lugar de utilizar la identidad actual. Esto puede provocar problemas de recuento de referencias que provoquen Use-After-Free. Recomendamos actualizar a la versi\u00f3n anterior 5.10.161."}], "id": "CVE-2023-0240", "lastModified": "2026-06-17T05:25:06.073", "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": "cve-coordination@google.com", "type": "Secondary"}, {"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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-0240", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-08-01T18:22:24.961145Z", "version": "2.0.3"}}]}, "published": "2023-01-30T14:15:10.403", "references": [{"source": "cve-coordination@google.com", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93"}, {"source": "cve-coordination@google.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49"}, {"source": "cve-coordination@google.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Vendor Advisory"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/gregkh/linux/commit/1e6fa5216a0e59ef02e8b6b40d553238a3b81d49"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20230316-0001/"}], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "cve-coordination@google.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: io_uring: reference counting issue in io_prep_async_work leads to use-after-free", "id": "2165852", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2165852"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation.\nIn the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.", "A logic error was found in the io_uring subsystem of the Linux kernel. This issue occurs due to an incorrect assumption that the last io_grab_identity call could not return false in the io_prep_async_work function, leading to reference counting issues and a use-after-free issue. This could allow a local user to crash or escalate their privileges on the system."], "name": "CVE-2023-0240", "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": "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": "2020-10-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-0240\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-0240"], "statement": "Red Hat Enterprise Linux is not affected by this flaw, as the io_uring (CONFIG_IO_URING) is not enabled in any current shipping kernels.", "threat_severity": "Important"}

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