Medium severity5.4NVD Advisory· Published Jun 17, 2026· Updated Jun 28, 2026
CVE-2026-12528
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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Affected products
11cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords2 versionspkg:rpm/opensuse/389-ds&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/389-ds&distro=openSUSE%20Tumbleweed
< 3.0.6~git382.7a51ea5f5-160000.1.1+ 1 more
- (no CPE)range: < 3.0.6~git382.7a51ea5f5-160000.1.1
- (no CPE)range: < 3.2.2+4b41542b2-1.1
Patches
Vulnerability mechanics
References
3- github.com/389ds/389-ds-base/pull/7542nvdPatch
- access.redhat.com/security/cve/CVE-2026-12528nvdVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
News mentions
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