CVE-2026-12528

Description

A flaw was found in 389 Directory Server in the __aclp__normalize_acltxt() function of aclparse.c. A malformed ACI (Access Control Instruction) string can trigger heap-buffer-overflow writes and reads during ACI parsing. The function fails to validate that the ACI keyword has sufficient length after whitespace stripping, leading to a 1-byte out-of-bounds write and subsequent out-of-bounds reads. An authenticated user with write access to the aci attribute could send a crafted ACI value to silently corrupt heap memory in the directory server process.

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Produits concernés

• Red Hat Directory Server 11
• Red Hat Directory Server 12
• Red Hat Directory Server 13
• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 6
• Red Hat Enterprise Linux 7
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9
• Redhat directory server
• Redhat 389 directory server
• Redhat enterprise linux

Scores CVSS

Faiblesses (CWE)

• CWE-787

Références

• https://access.redhat.com/security/cve/CVE-2026-12528 Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2489835 Issue TrackingVendor Advisory
• https://github.com/389ds/389-ds-base/pull/7542 Patch

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories