{"id":"CVE-2026-77207","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77207","generatedAt":"2026-10-28T00:53:38.883Z","title":"This causes libreswan to dereference a null pointer leading to a crash and restart.","description":"Libreswan has a null pointer dereference bug in the PKCS#7 handling code for IKE certificate authentication. When libreswan decodes an IKE CERT payload of type CERT_PKCS7_WRAPPED_X509, it guards the PKCS#7 blob with SEC_PKCS7ContainsCertsOrCrls() and then iterates the certificate list with SEC_PKCS7GetCertificateList(). The two NSS APIs disagree on a SignedData that carries a CRL but no certificates: ContainsCertsOrCrls() returns PR_TRUE (there is a CRL), so the guard passes, but GetCertificateList() returns NULL (there are no certificates). This causes libreswan to dereference a null pointer leading to a crash and restart. A malicious IKE_AUTH packet can trigger this bug, meaning the peer does not need to be authenticated. No remote code execution is possible. Continued exploitation can cause a denial of service.","published":"2026-10-13T22:18:26.000Z","lastModified":"2026-10-16T19:56:00.000Z","status":"Awaiting Analysis","sourceIdentifier":"d42dc95b-23f1-4e06-9076-20753a0fb0df","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-252","CWE-476"],"affected":[],"epss":{"score":0.00463,"percentile":0.39853,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00339,"percentile":0.25639}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T22:18:26.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-13T22:18:26.040Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://libreswan.org/security/CVE-2026-77207/","source":"d42dc95b-23f1-4e06-9076-20753a0fb0df"},{"url":"https://libreswan.org/security/CVE-2026-77207/CVE-2026-77207.txt","source":"d42dc95b-23f1-4e06-9076-20753a0fb0df"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77207","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}