CVE-2026-12528
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
61/100
Published: 2026-06-17
Modified: 2026-11-06
First seen: 2026-11-06
Status: active
Attack Surface
Network
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
Low
A:
Low
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.
Weakness Classification (1)
Affected Software (8)
| Vendor | Product | Version |
|---|---|---|
| redhat | 389_directory_server | - |
| redhat | directory_server | 11.0 |
| redhat | directory_server | 12.0 |
| redhat | directory_server | 13.0 |
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
References & Advisories (3)
Vendor Advisory
Patch
Issue Tracking
Vendor Advisory