NULL pointer dereference in openldap
Priority MEDIUM 43CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 8 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
A vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x() function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01999 80th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 8 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | openldap | openldap-2.4 | — | No fix listed | CNA |
- openldap Vendor— Affected openldap-2.4 Fixed in — No fix listed CNA
CPE configurations NVD · 17
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:openldap:openldap:2.4:*:*:*:*:*:*:* | 2.4 | Vulnerable | openldap |
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Red Hat |
| cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Red Hat |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | 11.0 to before 11.7.9; 12.0 to before 12.6.8; 13.0 to before 13.5 | Vulnerable | Apple |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:ontap_tools:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:openldap:openldap:2.4:*:*:*:*:*:*:* Versions 2.4 Vulnerable ·openldap
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Red Hat
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.7.9; 12.0 to before 12.6.8; 13.0 to before 13.5 Vulnerable ·Apple
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:ontap_tools:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Show 7 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h410c:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Remediation
Red Hat 4 advisories
- RHSA-2025:8181 Released 2025-05-27 · Red Hat rating Lowopenldap security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) openldap-devel-2.6.2-3.el9_2.1
- Red Hat Enterprise Linux BaseOS EUS (v.9.2) openldap-2.6.2-3.el9_2.1, openldap-clients-2.6.2-3.el9_2.1, openldap-compat-2.6.2-3.el9_2.1
- RHSA-2025:8176 Released 2025-05-27 · Red Hat rating Lowopenldap security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) openldap-devel-2.6.2-1.el9_0.1
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) openldap-2.6.2-1.el9_0.1, openldap-clients-2.6.2-1.el9_0.1, openldap-compat-2.6.2-1.el9_0.1
- RHSA-2024:6033 Released 2024-08-29 · Red Hat rating Lowopenldap security update
- Red Hat CodeReady Linux Builder EUS (v.8.8) openldap-servers-2.4.46-20.el8_8
- Red Hat Enterprise Linux BaseOS EUS (v.8.8) openldap-2.4.46-20.el8_8, openldap-clients-2.4.46-20.el8_8, openldap-devel-2.4.46-20.el8_8
Show 1 more Red Hat advisories
- RHSA-2024:4264 Released 2024-07-02 · Red Hat rating Lowopenldap security update
- Red Hat Enterprise Linux BaseOS (v. 8) openldap-2.4.46-19.el8_10, openldap-clients-2.4.46-19.el8_10, openldap-devel-2.4.46-19.el8_10
- Red Hat Enterprise Linux CRB (v. 8) openldap-servers-2.4.46-19.el8_10
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder EUS (v.8.8) | Fixed | RHSA-2024:6033 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:8176 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2025:8181 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2024:4264 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:8176 |
| Red Hat Enterprise Linux BaseOS EUS (v.8.8) | Fixed | RHSA-2024:6033 |
| Red Hat Enterprise Linux BaseOS EUS (v.9.2) | Fixed | RHSA-2025:8181 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2024:4264 |
Not affected: 1 product
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-2953
- 2026-10-03 Alias added: GHSA-26fx-c7cw-5jh4
References
Advisory 6
Sources
- CVE-2023-2953 · CVE Program
- CVE-2023-2953 · NVD
- FIRST EPSS
- GHSA-26fx-c7cw-5jh4 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-2953 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences