CVE-2024-53073

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No local access to the server is needed.\nAC:L - The attacker fully controls both preconditions \u2014 create a large file, issue more than `sp_nrthreads` concurrent async COPY requests to exceed the cap, then every subsequent COPY deterministically hits the buggy error path. There is no race or uncontrolled state involved.\nPR:N - Triggering requires only an NFSv4.2 session and open stateids, which any host permitted by the export obtains without credential verification under the default AUTH_SYS \u2014 the same treatment given to other network-reachable nfsd CVEs (CVE-2024-53217, CVE-2024-56779).\nUI:N - The attacker's own NFS client issues the COPY requests; no action by an administrator or local user on the server is required beyond nfsd already serving an export.\nS:U - The imbalance corrupts only nfsd's own per-netns accounting and exhausts kernel resources within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The defect is a counter/refcount accounting error with no out-of-bounds or freed-memory access \u2014 refcount saturation prevents the premature free, so no kernel memory contents are disclosed to the attacker.\nI:N - No memory corruption occurs: the object is either freed exactly once or leaked, giving no write primitive and no way to modify file data or kernel state beyond the counter itself.\nA:H - Each rejected request either leaks a `struct nfsd4_copy` with a `refcount_t` underflow WARN (kernel panic under `panic_on_warn`) or drives `pending_async_copies` negative until the cap stops working, permitting unbounded concurrent \"copy thread\" kthreads and unbounded long-running server-side copies \u2014 remote kernel memory/thread exhaustion and NFS server DoS."}]}], "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": "ed98d26021db0fe62c327aa9f5e57a90bff3fa94", "status": "affected", "versionType": "git"}, {"version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf", "lessThan": "9467c49437e948c541569007cd412d577942e635", "status": "affected", "versionType": "git"}, {"version": "7ea9260874b779637aff6d24c344b8ef4ac862a0", "lessThan": "949ee5d44d1fd95119b29b3382a933cdc617bf9e", "status": "affected", "versionType": "git"}, {"version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e", "lessThan": "fb79d68a36e21960341ccab07d1ac06d93830321", "status": "affected", "versionType": "git"}, {"version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b", "lessThan": "1421883aa30c5d26bc3370e2d19cb350f0d5ca28", "status": "affected", "versionType": "git"}, {"version": "aadc3bbea163b6caaaebfdd2b6c4667fbc726752", "lessThan": "8286f8b622990194207df9ab852e0f87c60d35e9", "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/ed98d26021db0fe62c327aa9f5e57a90bff3fa94"}, {"url": "https://git.kernel.org/stable/c/9467c49437e948c541569007cd412d577942e635"}, {"url": "https://git.kernel.org/stable/c/949ee5d44d1fd95119b29b3382a933cdc617bf9e"}, {"url": "https://git.kernel.org/stable/c/fb79d68a36e21960341ccab07d1ac06d93830321"}, {"url": "https://git.kernel.org/stable/c/1421883aa30c5d26bc3370e2d19cb350f0d5ca28"}, {"url": "https://git.kernel.org/stable/c/8286f8b622990194207df9ab852e0f87c60d35e9"}], "title": "NFSD: Never decrement pending_async_copies on error", "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": "ed98d26021db0fe62c327aa9f5e57a90bff3fa94", "status": "affected", "version": "9e52ff544e0bfa09ee339fd7b0937ee3c080c24e", "versionType": "git"}, {"lessThan": "9467c49437e948c541569007cd412d577942e635", "status": "affected", "version": "43e46ee5efc03990b223f7aa8b77aa9c3d3acfdf", "versionType": "git"}, {"lessThan": "949ee5d44d1fd95119b29b3382a933cdc617bf9e", "status": "affected", "version": "7ea9260874b779637aff6d24c344b8ef4ac862a0", "versionType": "git"}, {"lessThan": "fb79d68a36e21960341ccab07d1ac06d93830321", "status": "affected", "version": "ae267989b7b7933dfedcd26468d0a88fc3a9da9e", "versionType": "git"}, {"lessThan": "1421883aa30c5d26bc3370e2d19cb350f0d5ca28", "status": "affected", "version": "6a488ad7745b8f64625c6d3a24ce7e448e83f11b", "versionType": "git"}, {"lessThan": "8286f8b622990194207df9ab852e0f87c60d35e9", "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": "BE92E684-8AEB-4596-990F-4EF87604710B", "versionEndExcluding": "6.11.7", "versionStartIncluding": "6.11.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: Never decrement pending_async_copies on error\n\nThe error flow in nfsd4_copy() calls cleanup_async_copy(), which\nalready decrements nn->pending_async_copies."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: Nunca decremente pending_async_copies en caso de error El flujo de error en nfsd4_copy() llama a cleanup_async_copy(), que ya decrementa nn->pending_async_copies."}], "id": "CVE-2024-53073", "lastModified": "2026-08-04T11:21:47.880", "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": "2024-11-19T18:15:26.950", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1421883aa30c5d26bc3370e2d19cb350f0d5ca28"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8286f8b622990194207df9ab852e0f87c60d35e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9467c49437e948c541569007cd412d577942e635"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/949ee5d44d1fd95119b29b3382a933cdc617bf9e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ed98d26021db0fe62c327aa9f5e57a90bff3fa94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fb79d68a36e21960341ccab07d1ac06d93830321"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: NFSD: Never decrement pending_async_copies on error", "id": "2327350", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2327350"}, "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-664", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nNFSD: Never decrement pending_async_copies on error\nThe error flow in nfsd4_copy() calls cleanup_async_copy(), which\nalready decrements nn->pending_async_copies."], "name": "CVE-2024-53073", "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", "product_name": "Red Hat Enterprise Linux 9"}, {"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": "2024-11-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-53073\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-53073\nhttps://lore.kernel.org/linux-cve-announce/2024111924-CVE-2024-53073-16f8@gregkh/T"], "threat_severity": "Moderate"}

{}