{"id":"CVE-2026-15390","state":"PUBLISHED","title":"Out-of-bounds write in Das U-Boot","description":"Das U-Boot with CONFIG_IP_DEFRAG=y parameter fails to clear IP reassembly state after delivering a complete datagram. An attacker who can deliver fragmented IP traffic can execute arbitrary code by sending duplicated last-fragment IP packets.\n\n\nThis issue was fixed in commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa in version 2026.07.","publishedAt":"2026-09-29T10:04:31.905Z","updatedAt":"2026-09-29T10:55:43.070Z","severity":{"score":9,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","source":"CERT-PL"},"assigner":"CERT-PL","products":["DENX Software Engineering Das U-Boot"],"affected":[{"vendor":"DENX Software Engineering","product":"Das U-Boot","defaultStatus":"unaffected","versions":[{"version":"2009.08","status":"affected","lessThanOrEqual":"2026.07","changes":[{"at":"commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa","status":"unaffected"}],"versionType":"date"}],"repo":"https://source.denx.de/u-boot/u-boot","modules":["__net_defragment()"],"programFiles":["net.c"]}],"references":["https://cert.pl/en/posts/2026/09/CVE-2026-15390","https://source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa"],"weaknesses":["CWE-787","CWE-459"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/15xxx/CVE-2026-15390.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-15390","state":"PUBLISHED","datePublished":"2026-09-29T10:04:31.905Z","dateUpdated":"2026-09-29T10:55:43.070Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-07-10T11:51:31.347Z"},"containers":{"cna":{"title":"Out-of-bounds write in Das U-Boot","descriptions":[{"lang":"en","value":"Das U-Boot with CONFIG_IP_DEFRAG=y parameter fails to clear IP reassembly state after delivering a complete datagram. An attacker who can deliver fragmented IP traffic can execute arbitrary code by sending duplicated last-fragment IP packets.\n\n\nThis issue was fixed in commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa in version 2026.07."}],"affected":[{"vendor":"DENX Software Engineering","product":"Das U-Boot","defaultStatus":"unaffected","versions":[{"version":"2009.08","status":"affected","lessThanOrEqual":"2026.07","changes":[{"at":"commit b1aec609bb5e0d08c25c888c91935287ab4ee5fa","status":"unaffected"}],"versionType":"date"}],"repo":"https://source.denx.de/u-boot/u-boot","modules":["__net_defragment()"],"programFiles":["net.c"]}],"references":[{"url":"https://cert.pl/en/posts/2026/09/CVE-2026-15390","tags":["third-party-advisory"]},{"url":"https://source.denx.de/u-boot/u-boot/-/commit/b1aec609bb5e0d08c25c888c91935287ab4ee5fa","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"CRITICAL","baseScore":9,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds write","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-459","lang":"en","description":"CWE-459 Incomplete cleanup","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-29T10:06:54.262Z"},"datePublic":"2026-09-29T00:00:00.000Z","tags":["x_open-source"],"credits":[{"lang":"en","value":"Mateusz Furdyna, Nokia","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T10:53:14.845353Z","id":"CVE-2026-15390","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T10:55:43.070Z"}}]}}}