CVE-2024-42246

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It might be safer to map EPERM to an error we would be more\n likely to expect from the network system - such as ECONNREFUSED or ENETDOWN.\n\nECONNREFUSED as error seems reasonable. For programs setting a different error\ncan be out of reach (see handling in 4fbac77d2d09) in particular on kernels\nwhich do not have f10d05966196 (\"bpf: Make BPF_PROG_RUN_ARRAY return -err\ninstead of allow boolean\"), thus given that it is better to simply remap for\nconsistent behavior. 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This\ncauses xs_tcp_setup_socket() to loop forever, filling up the syslog and causing\nthe kernel to potentially freeze up.\n\nNeil suggested:\n\n This will propagate -EPERM up into other layers which might not be ready\n to handle it. It might be safer to map EPERM to an error we would be more\n likely to expect from the network system - such as ECONNREFUSED or ENETDOWN.\n\nECONNREFUSED as error seems reasonable. For programs setting a different error\ncan be out of reach (see handling in 4fbac77d2d09) in particular on kernels\nwhich do not have f10d05966196 (\"bpf: Make BPF_PROG_RUN_ARRAY return -err\ninstead of allow boolean\"), thus given that it is better to simply remap for\nconsistent behavior. UDP does handle EPERM in xs_udp_send_request()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net, sunrpc: reasignar EPERM en caso de falla de conexi\u00f3n en xs_tcp_setup_socket Cuando se usa un programa BPF en kernel_connect(), la llamada puede devolver -EPERM. Esto hace que xs_tcp_setup_socket() se repita indefinidamente, llenando el syslog y provocando que el kernel se congele potencialmente. Neil sugiri\u00f3: Esto propagar\u00e1 -EPERM a otras capas que podr\u00edan no estar listas para manejarlo. Podr\u00eda ser m\u00e1s seguro asignar EPERM a un error que probablemente esperar\u00edamos del sistema de red, como ECONNREFUSED o ENETDOWN. ECONNREFUSED como error parece razonable. Para los programas, configurar un error diferente puede estar fuera de su alcance (consulte el manejo en 4fbac77d2d09), en particular en los n\u00facleos que no tienen f10d05966196 (\"bpf: Make BPF_PROG_RUN_ARRAY return -err en lugar de permitir boolean\"), por lo que es mejor simplemente reasignar para un comportamiento consistente. UDP maneja EPERM en xs_udp_send_request()."}], "id": "CVE-2024-42246", "lastModified": "2026-06-17T07:49:05.860", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-42246", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:13:31.910049Z", "version": "2.0.3"}}]}, "published": "2024-08-07T16:15:47.297", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/02ee1976edb21a96ce8e3fd4ef563f14cc16d041"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5d8254e012996cee1a0f9cc920531cb7e4d9a011"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/626dfed5fa3bfb41e0dffd796032b555b69f9cde"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/934247ea65bc5eca8bdb7f8c0ddc15cef992a5d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc790261218952635f846aaf90bcc0974f6f62c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d6c686c01c5f12ff8f7264e0ddf71df6cb0d4414"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2431e7db0fe0daccb2f06bb0d23740affcd2fa6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f388cfd913a2b96c05339a335f365795db1b36b6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:7001", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:7000", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.22.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6997", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.37.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6997", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.37.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-09-24T00:00:00Z"}, {"advisory": "RHSA-2024:6744", "cpe": "cpe:/a:redhat:rhel_eus:9.2", "package": "kernel-0:5.14.0-284.84.1.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-09-18T00:00:00Z"}, {"advisory": "RHSA-2024:6745", "cpe": "cpe:/a:redhat:rhel_eus:9.2::nfv", "package": "kernel-rt-0:5.14.0-284.84.1.rt14.369.el9_2", "product_name": "Red Hat Enterprise Linux 9.2 Extended Update Support", "release_date": "2024-09-18T00:00:00Z"}], "bugzilla": {"description": "kernel: net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket", "id": "2303514", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2303514"}, "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": "verified"}, "cwe": "CWE-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket\nWhen using a BPF program on kernel_connect(), the call can return -EPERM. This\ncauses xs_tcp_setup_socket() to loop forever, filling up the syslog and causing\nthe kernel to potentially freeze up.\nNeil suggested:\nThis will propagate -EPERM up into other layers which might not be ready\nto handle it. It might be safer to map EPERM to an error we would be more\nlikely to expect from the network system - such as ECONNREFUSED or ENETDOWN.\nECONNREFUSED as error seems reasonable. For programs setting a different error\ncan be out of reach (see handling in 4fbac77d2d09) in particular on kernels\nwhich do not have f10d05966196 (\"bpf: Make BPF_PROG_RUN_ARRAY return -err\ninstead of allow boolean\"), thus given that it is better to simply remap for\nconsistent behavior. UDP does handle EPERM in xs_udp_send_request().", "A flaw was found in the Linux kernel's bpf programs. Under certain conditions, when the kernel attempts to initiate a network connection using the kernel_connect function, it can return a value that causes the cx_tcp_setup_socket function to loop. This issue can lead to continuous data writing to the Syslog, filling up the available space and causing the kernel to freeze and become unresponsive."], "name": "CVE-2024-42246", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42246\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42246\nhttps://lore.kernel.org/linux-cve-announce/2024080742-CVE-2024-42246-0777@gregkh/T"], "statement": "Within regulated environments, a combination of the following controls acts as a significant barrier to successfully exploiting a CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability and therefore downgrades the severity of this particular CVE from Moderate to Low.\nThe platform enforces hardening guidelines to ensure the most restrictive setting needed for operational requirements. Event logs are collected and processed for centralization, correlation, analysis, monitoring, reporting, alerting, and retention. This process ensures that audit logs are generated for specific events involving sensitive information, enabling capabilities like excessive CPU usage, long execution times, or processes consuming abnormal amounts of memory. Static code analysis and peer code review techniques are used to execute robust input validation and error-handling mechanisms to ensure all user inputs are thoroughly validated, preventing infinite loops caused by malformed or unexpected input, such as unbounded user input or unexpected null values that cause loops to never terminate. In the event of successful exploitation, process isolation limits the effect of an infinite loop to a single process rather than allowing it to consume all system resources.", "threat_severity": "Moderate"}

{}