{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53689: libnfs through 6","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53689","status":"final","version":"1","initial_release_date":"2026-06-10T13:44:28.272Z","current_release_date":"2026-06-10T16:01:49.727Z","revision_history":[{"date":"2026-06-10T13:44:28.272Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53689 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53689"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53689"},{"category":"external","summary":"github.com","url":"https://github.com/sahlberg/libnfs/commit/55c18ea33a83d667f79f0ef209c96895795c729f"}]},"product_tree":{"branches":[{"category":"vendor","name":"sahlberg","branches":[{"category":"product_name","name":"libnfs","branches":[{"category":"product_version_range","name":"<55c18ea33a83d667f79f0ef209c96895795c729f","product":{"name":"sahlberg libnfs <55c18ea33a83d667f79f0ef209c96895795c729f","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:sahlberg:libnfs:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53689","title":"libnfs through 6","notes":[{"category":"description","text":"libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L","baseScore":7.1,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 55c18ea33a83d667f79f0ef209c96895795c729f.","product_ids":["CSAFPID-1"]}]}]}