{"id":"CVE-2026-99999","revision":"9bb34c1cd30942eeabd9e2141b4df52a","records":[{"revision":"9bb34c1cd30942eeabd9e2141b4df52a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-99999","aliases":[],"title":"ipv4: validate checksum_start before completing checksum","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: validate checksum_start before completing checksum\n\nIf a packet with bad checksum metadata gets into the ipv4 stack,\nskb_checksum_help can corrupt the network header and cause a bunch of\nmischief.\n\nThis was discovered and reported by Paulos, and has been reporoduced\nby others independently since.\n\nWe really shouldn't allow such packets in, but as a defence\nin depth measure, let's also check before we complete the checksum.\n\nA more complete validation at input is forthcoming, but needs more work.","state":0,"publishedAt":"2026-10-15T12:19:22.784+00:00","modifiedAt":"2026-10-19T21:19:28.844+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/ip.h\",\n                        \"net/bridge/netfilter/nf_conntrack_bridge.c\",\n                        \"net/ipv4/ip_output.c\",\n                        \"net/netfilter/nfnetlink_queue.c\",\n                        \"net/netfilter/xt_CHECKSUM.c\",\n                        \"net/xfrm/xfrm_output.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"a464d950f31c89565cbaae038cc60db04fe01956\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"0fab003ef4698e0628060a45a48f14b43ba2a40a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"94524b7b32691de2e2ce162c04d6cbc9106e5cbf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"a65f69e0f38ffbed1b128029e09097436416dc8b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"32a8b0adaa18e52aaa0b246b5ffe683075354dbb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"f3e835af6226f1dd12160cbd696081e9b6155de0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"c3e33464746166264334641dc850a36eef7e6326\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f43798c27684ab925adde7d8acc34c78c6e50df8\",\n                            \"lessThan\": \"6785011f8b16abf40b1e9d8b2e332232b3e68822\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/net/ip.h\",\n                        \"net/bridge/netfilter/nf_conntrack_bridge.c\",\n                        \"net/ipv4/ip_output.c\",\n                        \"net/netfilter/nfnetlink_queue.c\",\n                        \"net/netfilter/xt_CHECKSUM.c\",\n                        \"net/xfrm/xfrm_output.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.27\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.27\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.272\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.223\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.190\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.159\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.113\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.57\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.11\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":9.3,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956","https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a","https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf","https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b","https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb","https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0","https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326","https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822","https://pwn.ai/blog/pwnescape","https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99999","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99999","identifiers":["CVE-2026-99999"]},"retained":false,"historicalAffected":[]}],"coverage":[]}