{"schema":"threatline.record/2","record":{"id":"CVE-2026-99999","aliases":[],"summary":"ipv4: validate checksum_start before completing checksum","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"a464d950f31c89565cbaae038cc60db04fe01956","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"0fab003ef4698e0628060a45a48f14b43ba2a40a","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"94524b7b32691de2e2ce162c04d6cbc9106e5cbf","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"a65f69e0f38ffbed1b128029e09097436416dc8b","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"32a8b0adaa18e52aaa0b246b5ffe683075354dbb","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"f3e835af6226f1dd12160cbd696081e9b6155de0","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"c3e33464746166264334641dc850a36eef7e6326","status":"affected","versionType":"git"},{"version":"f43798c27684ab925adde7d8acc34c78c6e50df8","lessThan":"6785011f8b16abf40b1e9d8b2e332232b3e68822","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.27","status":"affected"},{"version":"0","lessThan":"2.6.27","status":"unaffected","versionType":"semver"},{"version":"5.10.272","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.223","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.190","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.159","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.57","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.11","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0fab003ef4698e0628060a45a48f14b43ba2a40a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"94524b7b32691de2e2ce162c04d6cbc9106e5cbf","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"32a8b0adaa18e52aaa0b246b5ffe683075354dbb","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","source_modified_at":"2026-10-19T21:19:28.844Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6785011f8b16abf40b1e9d8b2e332232b3e68822","basis":"first unaffected version stated in the CVE record"}],"cvss":9.3,"severity":"Critical","kev":{"listed":false},"epss":{"probability":0.00323,"percentile":0.24075,"score_date":"2026-10-23"},"published_at":"2026-10-15T12:19:22.784Z","modified_at":"2026-10-19T21:19:28.844Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-99999","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T21:19:28.844Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-99999","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822"},{"source":"CVE List","url":"https://pwn.ai/blog/pwnescape"},{"source":"CVE List","url":"https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-16T15:49:03.519458Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T21:19:28.844Z","content_hash":"5e407e1476a1b114fec3e3904b4d87ed544ea89d87e68a44110b527bbc3a8a7c"}}