{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-11774: 389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-11774","status":"final","version":"1","initial_release_date":"2026-06-11T17:54:34.539Z","current_release_date":"2026-06-12T15:14:14.593Z","revision_history":[{"date":"2026-06-11T17:54:34.539Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-11774 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-11774"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-11774"},{"category":"external","summary":"access.redhat.com","url":"https://access.redhat.com/security/cve/CVE-2026-11774"},{"category":"external","summary":"RHBZ#2484916","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2484916"},{"category":"external","summary":"redhat.atlassian.net","url":"https://redhat.atlassian.net/browse/PSIRTSUPT-7600"}]},"product_tree":{"branches":[{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Directory Server 11","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Directory Server 11 *","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_directory_server_11:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Directory Server 12","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Directory Server 12 *","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_directory_server_12:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Directory Server 13","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Directory Server 13 *","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_directory_server_13:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Enterprise Linux 10","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Enterprise Linux 10 *","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_enterprise_linux_10:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Enterprise Linux 6","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Enterprise Linux 6 *","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_enterprise_linux_6:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Enterprise Linux 7","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Enterprise Linux 7 *","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_enterprise_linux_7:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Enterprise Linux 8","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Enterprise Linux 8 *","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_enterprise_linux_8:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Red Hat","branches":[{"category":"product_name","name":"Red Hat Enterprise Linux 9","branches":[{"category":"product_version","name":"*","product":{"name":"Red Hat Red Hat Enterprise Linux 9 *","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:red_hat:red_hat_enterprise_linux_9:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-11774","title":"389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow","notes":[{"category":"description","text":"An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H","baseScore":7.6,"baseSeverity":"HIGH"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8"]}]}]}