{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43028", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.976Z", "datePublished": "2026-05-01T14:15:29.192Z", "dateUpdated": "2026-08-05T12:25:21.789Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:21.789Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: ensure names are nul-terminated\n\nReject names that lack a \\0 character before feeding them\nto functions that expect c-strings.\n\nFixes tag is the most recent commit that needs this change." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable x_tables match validation is reached by local rule creation paths such as iptables setsockopt table replacement or nft_compat netlink rule creation, not by received network packets.\nAC:L - A local attacker can deterministically submit a crafted match blob with a non-NUL-terminated cgroup path or rateest name; no race or victim state is required.\nPR:L - The path requires CAP_NET_ADMIN in the target network namespace, but netfilter administration is reachable by an unprivileged user through user and network namespaces on systems allowing unprivileged user namespaces.\nUI:N - After obtaining the local namespace privileges, the attacker directly invokes the rule insertion path without any victim action.\nS:U - The issue affects kernel netfilter processing within the same host kernel security authority and does not cross a VM, hypervisor, or separate security scope boundary.\nC:H - The bug feeds attacker-controlled fixed-size fields lacking a NUL terminator into C-string consumers, and affected kernels can read past the intended match field into adjacent kernel memory until a NUL is found. Because this out-of-bounds read is not strictly bounded to only a few bytes across affected versions, confidentiality is scored High.\nI:N - The investigated paths show an out-of-bounds read/string validation failure during rule validation, with no write primitive or control-flow modification identified.\nA:H - The unterminated C-string scan can run beyond the allocated rule data and fault or oops the kernel, producing a local denial of service that can be triggered repeatedly." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/xt_cgroup.c", "net/netfilter/xt_rateest.c" ], "versions": [ { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "bcac50ea0a29d430eedc5ac87b215393b567baa9", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "ea01c1b219f5a11c66918abaa6f052e5a74041d6", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "aa6cd4a8863391e0a64f62d8922cb0af732a2cf2", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "c2d4a3abb15ca14716c6d8b9ffcbcd7c63626af4", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "673bbd36cba21d10a10f0932f479df7468e26fbb", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "f419bdc205894750f4d3ec042bc87a1b9cde1351", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "73124608172890306b85f2206d8b3cac20e324f1", "status": "affected", "versionType": "git" }, { "version": "c38c4597e4bf3e99860eac98211748e1ecb0e139", "lessThan": "a958a4f90ddd7de0800b33ca9d7b886b7d40f74e", "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/xt_cgroup.c", "net/netfilter/xt_rateest.c" ], "versions": [ { "version": "4.5", "status": "affected" }, { "version": "0", "lessThan": "4.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.5", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.1.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.5", "versionEndExcluding": "6.6.134" }, { "vulnerable": true, "criteria": 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