{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43452", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.010Z", "datePublished": "2026-05-08T14:22:17.361Z", "dateUpdated": "2026-05-08T14:22:17.361Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-08T14:22:17.361Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: guard option walkers against 1-byte tail reads\n\nWhen the last byte of options is a non-single-byte option kind, walkers\nthat advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end\nof the option area.\n\nAdd an explicit i == optlen - 1 check before dereferencing op[i + 1]\nin xt_tcpudp and xt_dccp option walkers."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/xt_dccp.c", "net/netfilter/xt_tcpudp.c"], "versions": [{"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "c2a445367a496a3c25dbc940c10c8bd1cfd4c14a", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "ae1e1267650638136b84c23f2b31250f0ccb6823", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "c39f84e4be1be63fc60ca7141ea7b76edcea5907", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "9b94f0e42ed248eb31929da84ed9f5310d7ff540", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "bc18551c6169eac5ed813778d3e3e484002dbbe5", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "d04800323336eebf441d153f43234eac9b833d36", "status": "affected", "versionType": "git"}, {"version": "2e4e6a17af35be359cc8f1c924f8f198fbd478cc", "lessThan": "cfe770220ac2dbd3e104c6b45094037455da81d4", "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_dccp.c", "net/netfilter/xt_tcpudp.c"], "versions": [{"version": "2.6.16", "status": "affected"}, {"version": "0", "lessThan": "2.6.16", "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": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "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": "2.6.16", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.16", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a"}, {"url": "https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823"}, {"url": "https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907"}, {"url": "https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540"}, {"url": "https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c"}, {"url": "https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5"}, {"url": "https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36"}, {"url": "https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4"}], "title": "netfilter: x_tables: guard option walkers against 1-byte tail reads", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: x_tables: guard option walkers against 1-byte tail reads\n\nWhen the last byte of options is a non-single-byte option kind, walkers\nthat advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end\nof the option area.\n\nAdd an explicit i == optlen - 1 check before dereferencing op[i + 1]\nin xt_tcpudp and xt_dccp option walkers."}], "id": "CVE-2026-43452", "lastModified": "2026-05-08T15:16:57.900", "metrics": {}, "published": "2026-05-08T15:16:57.900", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b94f0e42ed248eb31929da84ed9f5310d7ff540"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae1e1267650638136b84c23f2b31250f0ccb6823"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc18551c6169eac5ed813778d3e3e484002dbbe5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2a445367a496a3c25dbc940c10c8bd1cfd4c14a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c39f84e4be1be63fc60ca7141ea7b76edcea5907"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cfe770220ac2dbd3e104c6b45094037455da81d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d04800323336eebf441d153f43234eac9b833d36"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: netfilter: x_tables: guard option walkers against 1-byte tail reads", "id": "2468215", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468215"}, "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"}, "cwe": "CWE-193", "details": ["A flaw was found in the Linux kernel's netfilter component, specifically within the `xt_tcpudp` and `xt_dccp` option walkers. When processing network packet options, a 1-byte tail read vulnerability allows the system to access memory beyond the intended buffer. This out-of-bounds read could potentially lead to information disclosure or a denial of service."], "name": "CVE-2026-43452", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43452\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43452\nhttps://lore.kernel.org/linux-cve-announce/2026050858-CVE-2026-43452-9210@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,c2a445367a496a3c25dbc940c10c8bd1cfd4c14a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,ae1e1267650638136b84c23f2b31250f0ccb6823)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,c39f84e4be1be63fc60ca7141ea7b76edcea5907)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,9b94f0e42ed248eb31929da84ed9f5310d7ff540)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,bc18551c6169eac5ed813778d3e3e484002dbbe5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,d04800323336eebf441d153f43234eac9b833d36)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2e4e6a17af35be359cc8f1c924f8f198fbd478cc,cfe770220ac2dbd3e104c6b45094037455da81d4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.16"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.78,6.13.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T17:00:16.207823+00:00", "updated": "2026-05-08T20:45:16.051599+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125"]}