Riskcovery

CVE-2026-11610

389-ds-base: 389-ds-base: heap buffer overflow in sasl_io_recv() via padded sasl unbind

State
Published
Severity
8.8 High
Published
Jul 7, 2026
Updated
Jul 8, 2026
Reserved
Jun 8, 2026

Read the record on cve.org

Description

A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). After a successful SASL bind with integrity protection (SSF > 0), an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet that is copied into a 512-byte heap receive buffer without a bounds check in sasl_io_recv() in sasl_io.c. This allows up to approximately 2 megabytes of attacker-controlled data to overflow the buffer, causing a denial of service (server crash). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, any enrolled host, or any service account can trigger this vulnerability over the network after authenticating via GSSAPI. The vulnerable code path has existed since approximately 2013 (389-ds-base 1.3.2) and was not addressed by the CVE-2025-14905 fix, which patched a separate heap overflow in schema.c only.

Scores

CVSSScoreVectorSource
3.18.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hredhat

Weaknesses

Affected Products

ProductVersions
389-ds-base389ds
  • 1.3.2 through 3.3.0Affected
Red Hat Directory Server 11.5 E4S for RHEL 8Red Hat
  • 8060020260702180044.0ca98e7e and laterNot affected
Red Hat Directory Server 11.7 E4S for RHEL 8Red Hat
  • 8080020260702180836.f969626e and laterNot affected
Red Hat Directory Server 11.9 for RHEL 8Red Hat
  • 8100020260702145313.37ed7c03 and laterNot affected
Red Hat Directory Server 12.2 E4S for RHEL 9Red Hat
  • 9020020260703060155.1674d574 and laterNot affected
Red Hat Directory Server 12.4 E4S for RHEL 9Red Hat
  • 9040020260703055735.1674d574 and laterNot affected
Red Hat Enterprise Linux 10Red Hat
  • 0:3.2.0-8.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat
  • 0:3.0.6-19.el10_0 and laterNot affected
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat
  • 0:1.3.11.1-13.el7_9 and laterNot affected
Red Hat Enterprise Linux 8Red Hat
  • 8100020260626120929.25e700aa and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat
  • 8040020260629123121.96015a92 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat
  • 8040020260629123121.96015a92 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat
  • 8060020260626130540.824efc52 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat
  • 8060020260626130540.824efc52 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat
  • 8080020260630025241.6dbb3803 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat
  • 8080020260630025241.6dbb3803 and laterNot affected
Red Hat Enterprise Linux 9Red Hat
  • 0:2.8.0-8.el9_8 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat
  • 0:2.2.4-19.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat
  • 0:2.4.5-26.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat
  • 0:2.6.1-22.el9_6 and laterNot affected
Red Hat Directory Server 13.2Red Hat
  • 1783452100 and laterNot affected
Red Hat Directory Server 12Red Hat
    Red Hat Directory Server 13Red Hat
      Red Hat Enterprise Linux 6Red Hat

        References

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