CVE-2023-53360

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53360", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.733Z", "datePublished": "2025-09-17T14:56:50.287Z", "dateUpdated": "2026-08-05T09:13:39.775Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:39.775Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4.2: Rework scratch handling for READ_PLUS (again)\n\nI found that the read code might send multiple requests using the same\nnfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is\nhow we ended up occasionally double-freeing the scratch buffer, but also\nmeans we set a NULL pointer but non-zero length to the xdr scratch\nbuffer. This results in an oops the first time decoding needs to copy\nsomething to scratch, which frequently happens when decoding READ_PLUS\nhole segments.\n\nI fix this by moving scratch handling into the pageio read code. I\nprovide a function to allocate scratch space for decoding read replies,\nand free the scratch buffer when the nfs_pgio_header is freed."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - This is NFS client reply decoding (fs/nfs READ_PLUS): a malicious/compromised NFSv4.2 server or on-path AUTH_SYS attacker drives short reads and resends so the same nfs_pgio_header is reused after scratch is freed, then supplies READ_PLUS XDR that hits xdr_copy_to_scratch over the network.\nAC:L - The server fully controls short-read counts, READ_PLUS hole/data segment layout, and ENOTSUPP/stateid/sequence restarts that force rpc_restart_call_prepare without re-running nfs4_proc_read_setup; CONFIG_NFS_V4_2_READ_PLUS defaults to y, so no condition is outside attacker influence.\nPR:N - Exploitation is from the remote NFS server (or MITM) with no credentials or account on the victim client; decoding runs in the client's normal READ_PLUS completion path.\nUI:N - An existing NFSv4.2 mount plus routine/background read I/O is enough; the malicious server can wait for ordinary client reads without inducing a distinct victim action at exploit time.\nS:U - The double-free/UAF and resulting corruption stay in the NFS client's kernel address space within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Before the pointer was nulled, the resend path left a dangling scratch pointer so the next READ_PLUS decode memcpy'd into freed heap (UAF write/read of reclaimed slab); double-free/UAF enables arbitrary kernel disclosure per kernel guidance.\nI:H - The same resend path double-frees the kmalloc scratch (CWE-415) and, while the dangling pointer remains, writes attacker-shaped XDR fragments into reclaimed heap via xdr_copy_to_scratch \u2014 a heap corruption primitive suitable for control-flow hijack.\nA:H - After free-and-NULL, the next decode sets a NULL scratch with non-zero length and oopses on the first xdr_copy_to_scratch (common for READ_PLUS hole segments); double-free also reliably crashes or corrupts the client and is repeatable by the remote server."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "versions": [{"version": "886959f425b6a936a30b82a297ae3aecb3b8230f", "lessThan": "adac9f0ddd2b291c7ce41f549fdb27a13616cff5", "status": "affected", "versionType": "git"}, {"version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "a2f4cb206bd94b3f4a7bb05fcdce9525283b5681", "status": "affected", "versionType": "git"}, {"version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "ae5d5672f1db711e91db6f52df5cb16ecd8f5692", "status": "affected", "versionType": "git"}, {"version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "303a78052091c81e9003915c521fdca1c7e117af", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.16", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5.3", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6", "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": "6.4", "versionEndExcluding": "6.4.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.5.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5"}, {"url": "https://git.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681"}, {"url": "https://git.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692"}, {"url": "https://git.kernel.org/stable/c/303a78052091c81e9003915c521fdca1c7e117af"}], "title": "NFSv4.2: Rework scratch handling for READ_PLUS (again)", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-53360", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:43:57.674879Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:53:00.565Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-53360", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:43:57.674879Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:43:53.394Z"}}], "cna": {"title": "NFSv4.2: Rework scratch handling for READ_PLUS (again)", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "886959f425b6a936a30b82a297ae3aecb3b8230f", "lessThan": "adac9f0ddd2b291c7ce41f549fdb27a13616cff5", "versionType": "git"}, {"status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "a2f4cb206bd94b3f4a7bb05fcdce9525283b5681", "versionType": "git"}, {"status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "ae5d5672f1db711e91db6f52df5cb16ecd8f5692", "versionType": "git"}, {"status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "lessThan": "303a78052091c81e9003915c521fdca1c7e117af", "versionType": "git"}], "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"status": "unaffected", "version": "0", "lessThan": "6.4", "versionType": "semver"}, {"status": "unaffected", "version": "6.4.16", "versionType": "semver", "lessThanOrEqual": "6.4.*"}, {"status": "unaffected", "version": "6.5.3", "versionType": "semver", "lessThanOrEqual": "6.5.*"}, {"status": "unaffected", "version": "6.6", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5"}, {"url": "https://git.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681"}, {"url": "https://git.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692"}, {"url": "https://git.kernel.org/stable/c/303a78052091c81e9003915c521fdca1c7e117af"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4.2: Rework scratch handling for READ_PLUS (again)\n\nI found that the read code might send multiple requests using the same\nnfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is\nhow we ended up occasionally double-freeing the scratch buffer, but also\nmeans we set a NULL pointer but non-zero length to the xdr scratch\nbuffer. This results in an oops the first time decoding needs to copy\nsomething to scratch, which frequently happens when decoding READ_PLUS\nhole segments.\n\nI fix this by moving scratch handling into the pageio read code. I\nprovide a function to allocate scratch space for decoding read replies,\nand free the scratch buffer when the nfs_pgio_header is freed."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.4.16", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.5.3", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6", "versionStartIncluding": "6.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-04T09:14:19.615Z"}}}, "cveMetadata": {"cveId": "CVE-2023-53360", "state": "PUBLISHED", "dateUpdated": "2026-08-04T09:14:19.615Z", "dateReserved": "2025-09-17T14:54:09.733Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-17T14:56:50.287Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "adac9f0ddd2b291c7ce41f549fdb27a13616cff5", "status": "affected", "version": "886959f425b6a936a30b82a297ae3aecb3b8230f", "versionType": "git"}, {"lessThan": "a2f4cb206bd94b3f4a7bb05fcdce9525283b5681", "status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "versionType": "git"}, {"lessThan": "ae5d5672f1db711e91db6f52df5cb16ecd8f5692", "status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "versionType": "git"}, {"lessThan": "303a78052091c81e9003915c521fdca1c7e117af", "status": "affected", "version": "fbd2a05f29a95d5b42b294bf47e55a711424965b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/nfs/internal.h", "fs/nfs/nfs42.h", "fs/nfs/nfs42xdr.c", "fs/nfs/nfs4proc.c", "fs/nfs/read.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.4.*", "status": "unaffected", "version": "6.4.16", "versionType": "semver"}, {"lessThanOrEqual": "6.5.*", "status": "unaffected", "version": "6.5.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.6", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E6DE3FBB-E140-429F-B4D5-A4A31DB84222", "versionEndExcluding": "6.4.16", "versionStartIncluding": "6.4", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "880C803A-BEAE-4DA0-8A59-AC023F7B4EE3", "versionEndExcluding": "6.5.3", "versionStartIncluding": "6.5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4.2: Rework scratch handling for READ_PLUS (again)\n\nI found that the read code might send multiple requests using the same\nnfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is\nhow we ended up occasionally double-freeing the scratch buffer, but also\nmeans we set a NULL pointer but non-zero length to the xdr scratch\nbuffer. This results in an oops the first time decoding needs to copy\nsomething to scratch, which frequently happens when decoding READ_PLUS\nhole segments.\n\nI fix this by moving scratch handling into the pageio read code. I\nprovide a function to allocate scratch space for decoding read replies,\nand free the scratch buffer when the nfs_pgio_header is freed."}], "id": "CVE-2023-53360", "lastModified": "2026-08-04T10:19:03.430", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53360", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-14T18:43:57.674879Z", "version": "2.0.3"}}]}, "published": "2025-09-17T15:15:40.123", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/303a78052091c81e9003915c521fdca1c7e117af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-415"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: NFSv4.2: Rework scratch handling for READ_PLUS (again)", "id": "2396131", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396131"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53360", "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": "Under investigation", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53360\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53360\nhttps://lore.kernel.org/linux-cve-announce/2025091722-CVE-2023-53360-a553@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-09-18T11:59:16.429925+00:00", "updated": "2025-09-18T11:59:16.429985+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}