CVE catalog

CVE-2026-12528

Severity: Medium · CVSS 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Published: Jun 3, 2026, 1:09:01 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.23% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	389-ds-base	sid	`3.3.1-3`	vulnerable
Debian	389-ds-base	trixie	`3.1.2+dfsg1-1+deb13u1`	vulnerable
Debian	389-ds-base	bookworm	`2.3.1+dfsg1-1+deb12u1`	vulnerable
Cpe	389-ds-base	Not reported	Not reported	vulnerable
Cpe	directory_server	Not reported	Not reported	unknown
Cpe	389_directory_server	Not reported	Not reported	unknown
Cpe	enterprise_linux	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	389-ds-base	source	sid	`(unfixed)`	not yet assigned	Not reported	[1140484]
Debian	389-ds-base	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1140484]
Debian	389-ds-base	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1140484]

[Debian bug #1140484]

Notes

[trixie] 389-ds-base: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[389-ds]Affected
Source package: [389-ds-base]
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
[389-ds-base]Affected
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
[389-ds-base-dev]Affected
Source package: [389-ds-base]
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
[389-ds-base-libs]Affected
Source package: [389-ds-base]
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · amd64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · arm64 · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
[cockpit-389-ds]Affected
Source package: [389-ds-base]
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
[python3-lib389]Affected
Source package: [389-ds-base]
Details (2)
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12
- 2.3.1+dfsg1-1+deb12u1 · all · bookworm
  Affected
  nvd · 389-ds-base · debian · bookworm; nvd · 389-ds-base · debian · 12

[Debian 13 (Trixie)]

[389-ds]Affected
Source package: [389-ds-base]
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13
[389-ds-base]Affected
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · amd64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · arm64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
[389-ds-base-dev]Affected
Source package: [389-ds-base]
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · amd64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · arm64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
[389-ds-base-libs]Affected
Source package: [389-ds-base]
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · amd64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · arm64 · trixie
  Affected
  nvd · 389-ds-base · debian · 13
[cockpit-389-ds]Affected
Source package: [389-ds-base]
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13
[python3-lib389]Affected
Source package: [389-ds-base]
Details (2)
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13
- 3.1.2+dfsg1-1+deb13u1 · all · trixie
  Affected
  nvd · 389-ds-base · debian · 13

Observed: Oct 23, 2026, 9:45:35 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]