{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50213", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.429Z", "datePublished": "2025-06-18T11:03:50.958Z", "dateUpdated": "2026-08-05T08:57:42.866Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:57:42.866Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: do not allow SET_ID to refer to another table\n\nWhen doing lookups for sets on the same batch by using its ID, a set from a\ndifferent table can be used.\n\nThen, when the table is removed, a reference to the set may be kept after\nthe set is freed, leading to a potential use-after-free.\n\nWhen looking for sets by ID, use the table that was used for the lookup by\nname, and only return sets belonging to that same table.\n\nThis fixes CVE-2022-2586, also reported as ZDI-CAN-17470." } ], "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 reached only through the NETLINK_NETFILTER nftables API (batch NEWSET/NEWSETELEM/DELTABLE), which requires local process access; netfilter/nftables netlink is scored Local per kernel guidance.\nAC:L - The attacker fully controls the netlink batch that creates a cross-table SET_ID reference and deletes the owning table, so the UAF is reliably triggerable with no conditions outside attacker control; public exploits confirm this.\nPR:L - nfnetlink requires CAP_NET_ADMIN via netlink_net_capable(), but that capability is available in an unprivileged user+network namespace (unshare -Urn), so Privileges Required is Low, not High.\nUI:N - Exploitation is entirely attacker-driven through crafted nftables netlink messages; no victim action is required.\nS:U - Impact is standard host kernel privilege escalation within the same OS security authority; it does not cross a VM, IOMMU, or other security boundary, so Scope remains Unchanged.\nC:H - The UAF of nft_object enables controlled reuse and arbitrary kernel reads (including KASLR leaks via obj->key.name), so Confidentiality is High per UAF guidance.\nI:H - Freed nft_object reuse allows hijacking obj->ops->eval for RIP control and arbitrary code execution/LPE (demonstrated publicly), so Integrity is High.\nA:H - The dangling object/set reference causes kernel use-after-free crashes (KASAN/oops) even without full exploitation, so Availability is High." } ] } ], "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": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "77d3b5038b7462318f5183e2ad704b01d57215a2", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "fab2f61cc3b0e441b1749f017cfee75f9bbaded7", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "1a4b18b1ff11ba26f9a852019d674fde9d1d1cff", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "faafd9286f1355c76fe9ac3021c280297213330e", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "0d07039397527361850c554c192e749cfc879ea9", "status": "affected", "versionType": "git" }, { "version": "958bee14d0718ca7a5002c0f48a099d1d345812a", "lessThan": "470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2", "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": "3.16", "status": "affected" }, { "version": "0", "lessThan": "3.16", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.256", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.211", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.137", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.61", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.18", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.2", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "3.16", "versionEndExcluding": "4.19.256" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.4.211" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.10.137" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.15.61" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.18.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "5.19.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.16", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/77d3b5038b7462318f5183e2ad704b01d57215a2" }, { "url": "https://git.kernel.org/stable/c/fab2f61cc3b0e441b1749f017cfee75f9bbaded7" }, { "url": "https://git.kernel.org/stable/c/1a4b18b1ff11ba26f9a852019d674fde9d1d1cff" }, { "url": "https://git.kernel.org/stable/c/faafd9286f1355c76fe9ac3021c280297213330e" }, { "url": "https://git.kernel.org/stable/c/f4fa03410f7c5f5bd8f90e9c11e9a8c4b526ff6f" }, { "url": "https://git.kernel.org/stable/c/0d07039397527361850c554c192e749cfc879ea9" }, { "url": "https://git.kernel.org/stable/c/470ee20e069a6d05ae549f7d0ef2bdbcee6a81b2" } ], "title": "netfilter: nf_tables: do not allow SET_ID to refer to another table", "x_generator": { "engine": "bippy-1.2.0" } } } }