CVE-2024-49974

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Thus IMO async COPY can become a DoS vector.\n\nAdd a restriction mechanism that bounds the number of concurrent\nbackground COPY operations. Start simple and try to be fair -- this\npatch implements a per-namespace limit.\n\nAn async COPY request that occurs while this limit is exceeded gets\nNFS4ERR_DELAY. The requesting client can choose to send the request\nagain after a delay or fall back to a traditional read/write style\ncopy.\n\nIf there is need to make the mechanism more sophisticated, we can\nvisit that in future patches."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/netns.h", "fs/nfsd/nfs4proc.c", "fs/nfsd/nfs4state.c", "fs/nfsd/xdr4.h"], "versions": [{"version": "e0639dc5805a9d4faaa2c07ad98fa853b9529dd3", "lessThan": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e", "status": "affected", "versionType": "git"}, {"version": "e0639dc5805a9d4faaa2c07ad98fa853b9529dd3", "lessThan": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf", "status": "affected", "versionType": "git"}, {"version": "e0639dc5805a9d4faaa2c07ad98fa853b9529dd3", "lessThan": "7ea9260874b779637aff6d24c344b8ef4ac862a0", "status": "affected", "versionType": "git"}, {"version": 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In addition, AFAICT each async\nCOPY can copy an unlimited number of 4MB chunks, so can run for a\nlong time. Thus IMO async COPY can become a DoS vector.\n\nAdd a restriction mechanism that bounds the number of concurrent\nbackground COPY operations. Start simple and try to be fair -- this\npatch implements a per-namespace limit.\n\nAn async COPY request that occurs while this limit is exceeded gets\nNFS4ERR_DELAY. The requesting client can choose to send the request\nagain after a delay or fall back to a traditional read/write style\ncopy.\n\nIf there is need to make the mechanism more sophisticated, we can\nvisit that in future patches."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: Limitar el n\u00famero de operaciones de COPIA as\u00edncronas concurrentes No parece que nada limite el n\u00famero de operaciones de COPIA as\u00edncronas concurrentes que los clientes pueden iniciar. Adem\u00e1s, seg\u00fan tengo entendido, cada COPIA as\u00edncrona puede copiar una cantidad ilimitada de fragmentos de 4 MB, por lo que puede ejecutarse durante mucho tiempo. Por lo tanto, en mi opini\u00f3n, la COPIA as\u00edncrona puede convertirse en un vector de denegaci\u00f3n de servicio (DoS). Agregue un mecanismo de restricci\u00f3n que limite el n\u00famero de operaciones de COPIA en segundo plano concurrentes. Comience de manera simple e intente ser justo: este parche implementa un l\u00edmite por espacio de nombres. Una solicitud de COPIA as\u00edncrona que se produce mientras se excede este l\u00edmite obtiene NFS4ERR_DELAY. El cliente solicitante puede elegir enviar la solicitud nuevamente despu\u00e9s de un retraso o volver a una copia de estilo de lectura/escritura tradicional. Si es necesario hacer que el mecanismo sea m\u00e1s sofisticado, podemos tratarlo en parches futuros."}], "id": "CVE-2024-49974", "lastModified": "2026-06-17T08:00:51.540", "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-2024-49974", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-10-22T13:33:23.238318Z", "version": "2.0.3"}}]}, "published": "2024-10-21T18:15:18.227", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6a488ad7745b8f64625c6d3a24ce7e448e83f11b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ea9260874b779637aff6d24c344b8ef4ac862a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e52ff544e0bfa09ee339fd7b0937ee3c080c24e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aadc3bbea163b6caaaebfdd2b6c4667fbc726752"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae267989b7b7933dfedcd26468d0a88fc3a9da9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b4e21431a0db4854b5023cd5af001be557e6c3db"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2025:6966", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}, {"advisory": "RHSA-2025:6966", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-570.12.1.el9_6", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2025-05-13T00:00:00Z"}], "bugzilla": {"description": "kernel: NFSD: Limit the number of concurrent async COPY operations", "id": "2320559", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320559"}, "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-770", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nNFSD: Limit the number of concurrent async COPY operations\nNothing appears to limit the number of concurrent async COPY\noperations that clients can start. In addition, AFAICT each async\nCOPY can copy an unlimited number of 4MB chunks, so can run for a\nlong time. Thus IMO async COPY can become a DoS vector.\nAdd a restriction mechanism that bounds the number of concurrent\nbackground COPY operations. Start simple and try to be fair -- this\npatch implements a per-namespace limit.\nAn async COPY request that occurs while this limit is exceeded gets\nNFS4ERR_DELAY. The requesting client can choose to send the request\nagain after a delay or fall back to a traditional read/write style\ncopy.\nIf there is need to make the mechanism more sophisticated, we can\nvisit that in future patches."], "name": "CVE-2024-49974", "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:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-49974\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-49974\nhttps://lore.kernel.org/linux-cve-announce/2024102134-CVE-2024-49974-bda6@gregkh/T"], "threat_severity": "Moderate"}

{}