{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/40558?format=json","vulnerability_id":"VCID-qwcx-98py-6qg5","summary":"Use After Free\nThere is a use-after-free at asm/preproc.c (function pp_getline) in Netwide Assembler (NASM) rc16 that will cause a denial of service during certain finishes tests.","aliases":[{"alias":"CVE-2018-20538"}],"fixed_packages":[],"affected_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/53708?format=json","purl":"pkg:nuget/nasm@2.14.0","is_vulnerable":true,"affected_by_vulnerabilities":[{"vulnerability":"VCID-11p2-zbuv-13gy"},{"vulnerability":"VCID-2m25-r9n5-e3cx"},{"vulnerability":"VCID-4d33-n3b8-syc5"},{"vulnerability":"VCID-88sf-35rq-zkav"},{"vulnerability":"VCID-agk3-q1p7-bkb7"},{"vulnerability":"VCID-c3x9-gwbv-7keh"},{"vulnerability":"VCID-drn8-b7p7-tqc8"},{"vulnerability":"VCID-dtyu-u8sc-q7a4"},{"vulnerability":"VCID-eznc-tbwf-zyh8"},{"vulnerability":"VCID-hntb-je1p-v3dj"},{"vulnerability":"VCID-m35n-kbax-yuds"},{"vulnerability":"VCID-m8kc-xzgu-fyfh"},{"vulnerability":"VCID-mbcq-hctd-zye9"},{"vulnerability":"VCID-mc7p-6e6r-eqdm"},{"vulnerability":"VCID-ptzu-snj4-gfc2"},{"vulnerability":"VCID-qg3e-7rn4-mueu"},{"vulnerability":"VCID-qwcx-98py-6qg5"},{"vulnerability":"VCID-r4af-f3yb-6yb7"},{"vulnerability":"VCID-tsab-bkcw-j3gy"},{"vulnerability":"VCID-tvtj-uyfs-5kdn"},{"vulnerability":"VCID-xzcj-np5b-67d7"}],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:nuget/nasm@2.14.0"}],"references":[{"reference_url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20538.json","reference_id":"","reference_type":"","scores":[{"value":"3.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"}],"url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20538.json"},{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2018-20538","reference_id":"","reference_type":"","scores":[{"value":"0.00138","scoring_system":"epss","scoring_elements":"0.33503","published_at":"2026-06-04T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2018-20538"},{"reference_url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392531","reference_id":"","reference_type":"","scores":[],"url":"https://bugzilla.nasm.us/show_bug.cgi?id=3392531"},{"reference_url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml","reference_id":"","reference_type":"","scores":[{"value":"3.3","scoring_system":"cvssv3","scoring_elements":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"}],"url":"https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml"},{"reference_url":"https://bugzilla.redhat.com/show_bug.cgi?id=1663908","reference_id":"1663908","reference_type":"","scores":[],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1663908"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918269","reference_id":"918269","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918269"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20538","reference_id":"CVE-2018-20538","reference_type":"","scores":[],"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20538"}],"weaknesses":[{"cwe_id":1035,"name":"OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017."},{"cwe_id":416,"name":"Use After Free","description":"Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code."},{"cwe_id":937,"name":"OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities","description":"Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013."}],"exploits":[],"severity_range_score":"3.3 - 3.3","exploitability":"0.5","weighted_severity":"3.0","risk_score":1.5,"resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-qwcx-98py-6qg5"}