CVE-2024-50241

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-50241", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.976Z", "datePublished": "2024-11-09T10:14:51.119Z", "dateUpdated": "2026-08-05T11:42:42.206Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:42:42.206Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Initialize struct nfsd4_copy earlier\n\nEnsure the refcount and async_copies fields are initialized early.\ncleanup_async_copy() will reference these fields if an error occurs\nin nfsd4_copy(). If they are not correctly initialized, at the very\nleast, a refcount underflow occurs."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - The flaw is in nfsd's NFSv4.2 `OP_COPY` handler (`fs/nfsd/nfs4proc.c:nfsd4_copy()`), reached purely by sending a COMPOUND over TCP/2049 from a remote NFS client. The `ca_synchronous` flag that selects the vulnerable async branch is decoded directly from the wire in `nfsd4_decode_copy()`.\nAC:L - The attacker fully controls both trigger conditions \u2014 setting `ca_synchronous=false` and issuing more concurrent async COPYs than `sp_nrthreads` (default 8) by first parking several long-running copies. There is no race outside the attacker's control, no memory-layout dependency, and no unusual kernel configuration needed for the intra-server path.\nPR:N - Under AUTH_SYS \u2014 the default and overwhelmingly common NFS configuration \u2014 the server verifies no secret; a client simply asserts a UID to complete EXCHANGE_ID/CREATE_SESSION and OPEN the source/destination files, so no credentials in the CVSS sense are required. This matches the PR:N assigned to CVE-2024-53073, the companion fix to the identical error path.\nUI:N - The attacker's own COPY requests drive the entire sequence; no administrator or user on the NFS server has to open a file, mount anything, or take any action.\nS:U - The refcount underflow and leaked allocation are confined to the NFS server kernel's own memory and security authority, with no crossing into a hypervisor, IOMMU, or sandbox boundary.\nC:N - The underflow is caught by `refcount_warn_saturate()` and the object is simply never freed \u2014 there is no out-of-bounds read, no use-after-free of live data, and nothing from kernel memory is returned to the requesting client.\nI:N - No attacker-controlled write occurs: the leaked `struct nfsd4_copy` is unreachable and its refcount is saturated, so it is never reused or freed, yielding no corruption or control-flow primitive.\nA:H - `WARN_ONCE(\"refcount_t: underflow; use-after-free\")` panics the server outright on the common hardened/cloud setting `panic_on_warn=1`, and absent that, every triggering request permanently leaks a ~0.5 KB slab object, giving an unauthenticated remote client an unbounded kernel memory-exhaustion primitive that drives the NFS server to OOM."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4proc.c"], "versions": [{"version": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e", "lessThan": "059434d23c4578d9d02efb92d848ea21bc640112", "status": "affected", "versionType": "git"}, {"version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf", "lessThan": "7267625baf365a969f1b25ded6f07b64bc90ec5b", "status": "affected", "versionType": "git"}, {"version": "7ea9260874b779637aff6d24c344b8ef4ac862a0", "lessThan": "c3074003fa6837c2b89a34d8d12d9463b59d22d6", "status": "affected", "versionType": "git"}, {"version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e", "lessThan": "421f1a2a1afb47d88de09457ef7687e1df7bc997", "status": "affected", "versionType": "git"}, {"version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b", "lessThan": "e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1", "status": "affected", "versionType": "git"}, {"version": "aadc3bbea163b6caaaebfdd2b6c4667fbc726752", "lessThan": "63fab04cbd0f96191b6e5beedc3b643b01c15889", "status": "affected", "versionType": "git"}, {"version": "b4e21431a0db4854b5023cd5af001be557e6c3db", "status": "affected", "versionType": "git"}, {"version": "6.10.14", "lessThan": "6.11", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfsd/nfs4proc.c"], "versions": [{"version": "6.11.3", "lessThan": "6.11.7", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.3", "versionEndExcluding": "6.11.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.14"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112"}, {"url": "https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b"}, {"url": "https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6"}, {"url": "https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997"}, {"url": "https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1"}, {"url": "https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889"}], "title": "NFSD: Initialize struct nfsd4_copy earlier", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4proc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "059434d23c4578d9d02efb92d848ea21bc640112", "status": "affected", "version": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e", "versionType": "git"}, {"lessThan": "7267625baf365a969f1b25ded6f07b64bc90ec5b", "status": "affected", "version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf", "versionType": "git"}, {"lessThan": "c3074003fa6837c2b89a34d8d12d9463b59d22d6", "status": "affected", "version": "7ea9260874b779637aff6d24c344b8ef4ac862a0", "versionType": "git"}, {"lessThan": "421f1a2a1afb47d88de09457ef7687e1df7bc997", "status": "affected", "version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e", "versionType": "git"}, {"lessThan": "e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1", "status": "affected", "version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b", "versionType": "git"}, {"lessThan": "63fab04cbd0f96191b6e5beedc3b643b01c15889", "status": "affected", "version": "aadc3bbea163b6caaaebfdd2b6c4667fbc726752", "versionType": "git"}, {"status": "affected", "version": "b4e21431a0db4854b5023cd5af001be557e6c3db", "versionType": "git"}, {"lessThan": "6.11", "status": "affected", "version": "6.10.14", "versionType": "semver"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfsd/nfs4proc.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6.11.7", "status": "affected", "version": "6.11.3", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A3DF55BE-3AB2-4FEF-9C96-158917FB1E4C", "versionEndExcluding": "6.11.7", "versionStartIncluding": "6.10.14", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc4:*:*:*:*:*:*", "matchCriteriaId": "E0F717D8-3014-4F84-8086-0124B2111379", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc5:*:*:*:*:*:*", "matchCriteriaId": "24DBE6C7-2AAE-4818-AED2-E131F153D2FA", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Initialize struct nfsd4_copy earlier\n\nEnsure the refcount and async_copies fields are initialized early.\ncleanup_async_copy() will reference these fields if an error occurs\nin nfsd4_copy(). If they are not correctly initialized, at the very\nleast, a refcount underflow occurs."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: inicializar struct nfsd4_copy antes Aseg\u00farese de que los campos refcount y async_copies se inicialicen antes. cleanup_async_copy() har\u00e1 referencia a estos campos si se produce un error en nfsd4_copy(). Si no se inicializan correctamente, como m\u00ednimo, se produce un desbordamiento de refcount."}], "id": "CVE-2024-50241", "lastModified": "2026-08-04T11:21:36.033", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"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"}]}, "published": "2024-11-09T11:15:09.823", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/059434d23c4578d9d02efb92d848ea21bc640112"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/421f1a2a1afb47d88de09457ef7687e1df7bc997"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/63fab04cbd0f96191b6e5beedc3b643b01c15889"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7267625baf365a969f1b25ded6f07b64bc90ec5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c3074003fa6837c2b89a34d8d12d9463b59d22d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/e30a9a2f69c34a00a3cb4fd45c5d231929e66fb1"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-908"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: NFSD: Initialize struct nfsd4_copy earlier", "id": "2324873", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2324873"}, "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"}, "cwe": "CWE-908", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nNFSD: Initialize struct nfsd4_copy earlier\nEnsure the refcount and async_copies fields are initialized early.\ncleanup_async_copy() will reference these fields if an error occurs\nin nfsd4_copy(). If they are not correctly initialized, at the very\nleast, a refcount underflow occurs."], "name": "CVE-2024-50241", "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": "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": "2024-11-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50241\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50241\nhttps://lore.kernel.org/linux-cve-announce/2024110933-CVE-2024-50241-9744@gregkh/T"], "threat_severity": "Moderate"}

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