{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2023-52628", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-03-06T09:52:12.091Z", "datePublished": "2024-03-28T07:33:46.217Z", "dateUpdated": "2026-08-05T09:10:47.591Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:10:47.591Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nftables: exthdr: fix 4-byte stack OOB write\n\nIf priv->len is a multiple of 4, then dst[len / 4] can write past\nthe destination array which leads to stack corruption.\n\nThis construct is necessary to clean the remainder of the register\nin case ->len is NOT a multiple of the register size, so make it\nconditional just like nft_payload.c does.\n\nThe bug was added in 4.1 cycle and then copied/inherited when\ntcp/sctp and ip option support was added.\n\nBug reported by Zero Day Initiative project (ZDI-CAN-21950,\nZDI-CAN-21951, ZDI-CAN-21961)." } ], "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 vulnerable nft_exthdr eval paths are reached only after an attacker installs a crafted nftables rule over netlink and then triggers packet evaluation in that netns; nftables/netlink is a local attack surface, not remote packet parsing.\nAC:L - The attacker fully controls dreg/len via rule creation and can reliably force len to be a multiple of 4 that fills regs to the end, then trigger evaluation with a crafted local packet; no race or uncontrolled condition is required.\nPR:L - Rule installation requires CAP_NET_ADMIN checked via netlink_net_capable against the network namespace user_ns, which an unprivileged process obtains with user and network namespaces (unshare -Urn).\nUI:N - No victim action is needed; the attacker creates the malicious rule and sends packets in their own netns to hit the exthdr expression.\nS:U - Impact is kernel memory corruption / potential privilege escalation within the same host kernel authority; this is not a VM, IOMMU, or other cross-boundary escape.\nC:H - A kernel stack out-of-bounds write corrupts adjacent stack state and, per memory-corruption guidance and vendor notes of potential information disclosure, can be leveraged toward confidentiality impact; when uncertain the higher severity applies.\nI:H - This is a confirmed stack out-of-bounds write past struct nft_regs (into stackptr/jumpstack territory), and OOB writes are scored High for integrity due to exploitable control-flow / memory-corruption potential.\nA:H - Stack corruption adjacent to nft_do_chain locals can cause kernel oops/panic or broken jump-stack handling, yielding a high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nft_exthdr.c" ], "versions": [ { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "a7d86a77c33ba1c357a7504341172cc1507f0698", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "1ad7b189cc1411048434e8595ffcbe7873b71082", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "d9ebfc0f21377690837ebbd119e679243e0099cc", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "c8f292322ff16b9a2272a67de396c09a50e09dce", "status": "affected", "versionType": "git" }, { "version": "49499c3e6e18b7677a63316f3ff54a16533dc28f", "lessThan": "fd94d9dadee58e09b49075240fe83423eb1dcd36", "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/nft_exthdr.c" ], "versions": [ { "version": "4.1", "status": "affected" }, { "version": "0", "lessThan": "4.1", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.316", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.279", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.198", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.132", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.54", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5.4", "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": "4.1", "versionEndExcluding": "4.19.316" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.4.279" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.10.198" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "5.15.132" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.1.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.5.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.1", "versionEndExcluding": "6.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a" }, { "url": "https://git.kernel.org/stable/c/cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb" }, { "url": "https://git.kernel.org/stable/c/a7d86a77c33ba1c357a7504341172cc1507f0698" }, { "url": "https://git.kernel.org/stable/c/1ad7b189cc1411048434e8595ffcbe7873b71082" }, { "url": "https://git.kernel.org/stable/c/d9ebfc0f21377690837ebbd119e679243e0099cc" }, { "url": "https://git.kernel.org/stable/c/c8f292322ff16b9a2272a67de396c09a50e09dce" }, { "url": "https://git.kernel.org/stable/c/fd94d9dadee58e09b49075240fe83423eb1dcd36" } ], "title": "netfilter: nftables: exthdr: fix 4-byte stack OOB write", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CISA ADP Vulnrichment", "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-52628", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-03-28T18:07:47.232629Z" } } } ], "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:24:11.510Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/28a97c43c9e32f437ebb8d6126f9bb7f3ca9521a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/cf39c4f77a773a547ac2bcf30ecdd303bb0c80cb", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/a7d86a77c33ba1c357a7504341172cc1507f0698", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/1ad7b189cc1411048434e8595ffcbe7873b71082", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/d9ebfc0f21377690837ebbd119e679243e0099cc", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/c8f292322ff16b9a2272a67de396c09a50e09dce", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/fd94d9dadee58e09b49075240fe83423eb1dcd36", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T17:14:07.549Z" } } ] }, "dataVersion": "5.2" }