CVE-2022-50302

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Re-exported NFSv3 has been seen to Oops if the fl_file field\nis NULL."}], "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 - lockd\u2019s NLM service is network-facing (TCP/UDP), and nlmsvc_proc_free_all remotely invokes nlmsvc_free_host_resources \u2192 nlm_unlock_files, the vulnerable path; NFS re-export servers expose this to network clients.\nAC:L - An attacker who can take NLM locks on a re-exported NFSv3 share can reliably trigger the bug via FREE_ALL (or induce host-resource cleanup); no conditions beyond attacker control are required once that deployment is in place.\nPR:N - NLM accepts AUTH_NULL/AUTH_UNIX with no real credentials on the target; obtaining locks and calling FREE_ALL needs only network reachability to an allowed NFS/NLM export, not privileges on the vulnerable host.\nUI:N - Exploitation is entirely via attacker-sent NLM RPCs; no victim user action is required.\nS:U - Impact is a kernel oops/panic in the lockd/nfsd host\u2019s own kernel authority, with no crossing of a VM, IOMMU, or other security boundary.\nC:N - The defect is a pure NULL fl_file dereference in nlmclnt_setlockargs (file_inode(NULL)); it does not provide an information-disclosure or memory-read primitive.\nI:N - This is a NULL pointer dereference crash path, not memory corruption, UAF, or an attacker-controlled write; it does not yield integrity compromise or code execution.\nA:H - The NULL deref oopses lockd and the reported failure escalates to a full kernel panic, hard-denying service on the NFS re-export server."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/lockd/svcsubs.c"], "versions": [{"version": "486c1acf14233b1ff7b37e6f026a737a2f7f53f1", "lessThan": "31c93ee5f1e4dc278b562e20f3c3274ac34997f3", "status": "affected", "versionType": "git"}, {"version": "9c3eef773cf4a8a18f959234bbb4c0a55c31ab71", "lessThan": "95d42a8d3d4ae84a0bd3ee23e1fee240cdf0a9f0", "status": "affected", "versionType": "git"}, {"version": "aec158242b87a43d83322e99bc71ab4428e5ab79", "lessThan": "688575aef211b0986fc51010116f5888a99d76a2", "status": "affected", "versionType": "git"}, {"version": "aec158242b87a43d83322e99bc71ab4428e5ab79", "lessThan": "d7aa9f7778316beb690f6e2763b6d672ad8b256f", "status": "affected", "versionType": "git"}, {"version": "aec158242b87a43d83322e99bc71ab4428e5ab79", "lessThan": "18ebd35b61b4693a0ddc270b6d4f18def232e770", "status": "affected", "versionType": "git"}, {"version": "58c3f48a540b821b3253e2dc31c8fa237293ffc9", "status": "affected", "versionType": "git"}, {"version": "5.15.56", "lessThan": "5.15.86", "status": "affected", "versionType": "semver"}, {"version": "5.18.13", "lessThan": "5.19", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/lockd/svcsubs.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.86", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.16", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.2", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.56", "versionEndExcluding": "5.15.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.0.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.1.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/31c93ee5f1e4dc278b562e20f3c3274ac34997f3"}, {"url": "https://git.kernel.org/stable/c/95d42a8d3d4ae84a0bd3ee23e1fee240cdf0a9f0"}, {"url": "https://git.kernel.org/stable/c/688575aef211b0986fc51010116f5888a99d76a2"}, {"url": "https://git.kernel.org/stable/c/d7aa9f7778316beb690f6e2763b6d672ad8b256f"}, {"url": "https://git.kernel.org/stable/c/18ebd35b61b4693a0ddc270b6d4f18def232e770"}], "title": "lockd: set other missing fields when unlocking files", "x_generator": {"engine": "bippy-1.2.0"}}}}

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Re-exported NFSv3 has been seen to Oops if the fl_file field\nis NULL."}], "id": "CVE-2022-50302", "lastModified": "2026-08-04T10:18:10.267", "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": "2025-09-15T15:15:41.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/18ebd35b61b4693a0ddc270b6d4f18def232e770"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/31c93ee5f1e4dc278b562e20f3c3274ac34997f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/688575aef211b0986fc51010116f5888a99d76a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/95d42a8d3d4ae84a0bd3ee23e1fee240cdf0a9f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d7aa9f7778316beb690f6e2763b6d672ad8b256f"}], "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: lockd: set other missing fields when unlocking files", "id": "2395289", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395289"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50302", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50302\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50302\nhttps://lore.kernel.org/linux-cve-announce/2025091558-CVE-2022-50302-89ee@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-09-17T10:07:32.220650+00:00", "updated": "2025-09-17T10:07:32.220686+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}