{"cvss":9.3,"datePublished":"2026-10-15T13:17:14.137","dateUpdated":"2026-10-19T22:17:28.667","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.","id":"CVE-2026-99999","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["include/net/ip.h","net/bridge/netfilter/nf_conntrack_bridge.c","net/ipv4/ip_output.c","net/netfilter/nfnetlink_queue.c","net/netfilter/xt_CHECKSUM.c","net/xfrm/xfrm_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a464d950f31c89565cbaae038cc60db04fe01956","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"0fab003ef4698e0628060a45a48f14b43ba2a40a","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"94524b7b32691de2e2ce162c04d6cbc9106e5cbf","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"a65f69e0f38ffbed1b128029e09097436416dc8b","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"32a8b0adaa18e52aaa0b246b5ffe683075354dbb","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"f3e835af6226f1dd12160cbd696081e9b6155de0","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"c3e33464746166264334641dc850a36eef7e6326","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"},{"lessThan":"6785011f8b16abf40b1e9d8b2e332232b3e68822","status":"affected","version":"f43798c27684ab925adde7d8acc34c78c6e50df8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["include/net/ip.h","net/bridge/netfilter/nf_conntrack_bridge.c","net/ipv4/ip_output.c","net/netfilter/nfnetlink_queue.c","net/netfilter/xt_CHECKSUM.c","net/xfrm/xfrm_output.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.27"},{"lessThan":"2.6.27","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.272","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.223","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.190","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.159","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.57","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"id":"CVE-2026-99999","lastModified":"2026-10-19T22:17:28.667","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":2.5,"impactScore":6.0,"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-99999","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","timestamp":"2026-10-16T15:49:03.519458Z","version":"2.0.3"}}]},"published":"2026-10-15T13:17:14.137","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://pwn.ai/blog/pwnescape"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","url":"https://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge"},{"source":"af854a3a-2127-422b-91ae-364da2661108","url":"http://www.openwall.com/lists/oss-security/2026/10/15/5"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Received","weaknesses":[{"description":[{"lang":"en","value":"CWE-20"}],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary"}]},"severity":"CRITICAL","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: validate checksum_start before completing ..."}