{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52620", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-06T09:52:12.090Z", "datePublished": "2024-03-21T10:43:42.854Z", "dateUpdated": "2026-08-05T09:10:45.446Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:45.446Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: disallow timeout for anonymous sets\n\nNever used from userspace, disallow these parameters." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is triggered via the nfnetlink/nf_tables control plane (NFT_MSG_NEWSET with timeout attributes on an anonymous set, then rule delete), which requires a local netlink socket; nftables netlink is a Local attack vector.\nAC:L - The attacker fully controls both sides of the race by setting NFTA_SET_TIMEOUT/NFTA_SET_GC_INTERVAL (driving async rhash/pipapo GC frequency and element expiry) and issuing the unbind/delete transaction, and can retry indefinitely until the GC batch races with set teardown.\nPR:L - nfnetlink_rcv() only requires CAP_NET_ADMIN in the network namespace’s user_ns via netlink_net_capable(), which an unprivileged user obtains with unshare -Urn; nftables is fully functional per-netns.\nUI:N - Creating the anonymous timeout set, populating expiring elements, and deleting the binding rule are all performed by the attacker’s own process with no victim action.\nS:U - The resulting use-after-free corrupts kernel heap state within the same kernel security authority; this is standard local privilege escalation with no VM/IOMMU/sandbox boundary crossed.\nC:H - The GC-vs-destroy race yields a use-after-free on nft_rhash_elem/set objects whose size and contents the attacker chooses, enabling heap spray and arbitrary kernel memory disclosure; per guidance any UAF is Confidentiality High.\nI:H - Concurrent GC removal and set destroy produce UAF/double-free of attacker-sized slab objects—the same nftables heap-corruption primitive class used for local privilege escalation (as in related CVE-2024-26642/26643)—so Integrity is High.\nA:H - Even without successful exploitation, the UAF/double-free on set elements and the destroyed rhashtable causes slab corruption and kernel oops/panic, and the attacker can trigger it repeatedly." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nf_tables_api.c" ], "versions": [ { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "116b0e8e4673a5faa8a739a19b467010c4d3058c", "status": "affected", "versionType": "git" }, { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "49ce99ae43314d887153e07cec8bb6a647a19268", "status": "affected", "versionType": "git" }, { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "6f3ae02bbb62f151b19162d5fdc9fe3d48450323", "status": "affected", "versionType": "git" }, { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "00b19ee0dcc1aef06294471ab489bae26d94524e", "status": "affected", "versionType": "git" }, { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "b7be6c737a179a76901c872f6b4c1d00552d9a1b", "status": "affected", "versionType": "git" }, { "version": "761da2935d6e18d178582dbdf315a3a458555505", "lessThan": "e26d3009efda338f19016df4175f354a9bd0a4ab", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nf_tables_api.c" ], "versions": [ { "version": "4.1", "status": "affected" }, { "version": "0", "lessThan": "4.1", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.312", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.274", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.215", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.151", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.81", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4", "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": "4.1", "versionEndExcluding": "4.19.312" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.4.274" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.10.215" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.15.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.1.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/116b0e8e4673a5faa8a739a19b467010c4d3058c" }, { "url": "https://git.kernel.org/stable/c/49ce99ae43314d887153e07cec8bb6a647a19268" }, { "url": "https://git.kernel.org/stable/c/6f3ae02bbb62f151b19162d5fdc9fe3d48450323" }, { "url": "https://git.kernel.org/stable/c/00b19ee0dcc1aef06294471ab489bae26d94524e" }, { "url": "https://git.kernel.org/stable/c/b7be6c737a179a76901c872f6b4c1d00552d9a1b" }, { "url": "https://git.kernel.org/stable/c/e26d3009efda338f19016df4175f354a9bd0a4ab" } ], "title": "netfilter: nf_tables: disallow timeout for anonymous sets", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "lang": "en", "description": "CWE-noinfo Not enough information" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 2.5, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-26T20:33:31.634112Z", "id": "CVE-2023-52620", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-06T20:01:21.818Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:03:21.362Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/116b0e8e4673a5faa8a739a19b467010c4d3058c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/49ce99ae43314d887153e07cec8bb6a647a19268", "tags": [ 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"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" } ] } ] }, "dataVersion": "5.2" }