{"id":"CVE-2026-75883","state":"PUBLISHED","title":"PPPD buffer overflow in PEAP response code","description":"The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf\n without checking the available space and without implementing outgoing \nPEAP fragmentation. Thus a pppd process connecting to a server which \nrequests PEAP authentication can be induced to corrupt global static \ndata following the outpacket_buf array, most likely causing incorrect behavior or a crash.","publishedAt":"2026-09-18T15:29:07.702Z","updatedAt":"2026-09-22T14:43:35.788Z","severity":{"score":6.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","source":"redhat"},"assigner":"redhat","products":["PPP Project ppp"],"affected":[{"vendor":"PPP Project","product":"ppp","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.5.0","versionType":"semver"},{"version":"2.5.4","status":"unaffected","versionType":"semver"}],"repo":"https://github.com/interchange/interchange/"}],"references":["https://github.com/ppp-project/ppp/security/advisories/GHSA-rwr9-4vx8-vc35"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75883.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75883","state":"PUBLISHED","datePublished":"2026-09-18T15:29:07.702Z","dateUpdated":"2026-09-22T14:43:35.788Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-08-18T13:09:30.492Z"},"containers":{"cna":{"title":"PPPD buffer overflow in PEAP response code","descriptions":[{"lang":"en","value":"The code in pppd that formats a response to a PEAP Request packet in peap_response() copies an entire TLS record of up to 16384 bytes into the fixed global buffer outpacket_buf\n without checking the available space and without implementing outgoing \nPEAP fragmentation. Thus a pppd process connecting to a server which \nrequests PEAP authentication can be induced to corrupt global static \ndata following the outpacket_buf array, most likely causing incorrect behavior or a crash."}],"affected":[{"vendor":"PPP Project","product":"ppp","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.5.0","versionType":"semver"},{"version":"2.5.4","status":"unaffected","versionType":"semver"}],"repo":"https://github.com/interchange/interchange/"}],"references":[{"url":"https://github.com/ppp-project/ppp/security/advisories/GHSA-rwr9-4vx8-vc35","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseSeverity":"MEDIUM","baseScore":6.8,"vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","lang":"en","description":"CWE-122 Heap-based buffer overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-09-18T15:29:07.702Z"},"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T14:43:07.472707Z","id":"CVE-2026-75883","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":"2026-09-22T14:43:35.788Z"}}]}}}