CVE-2023-2953

HIGHNVD 7.57.5—

7.5

A vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x() function.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 81.0%
KEV: Not listed

Published

May 30, 2023

Last Modified

January 10, 2025

References (18)

secalert@redhathttp://seclists.org/fulldisclosure/2023/Jul/47
secalert@redhathttp://seclists.org/fulldisclosure/2023/Jul/48
secalert@redhathttp://seclists.org/fulldisclosure/2023/Jul/52
secalert@redhathttps://access.redhat.com/security/cve/CVE-2023-2953
secalert@redhathttps://bugs.openldap.org/show_bug.cgi?id=9904
secalert@redhathttps://security.netapp.com/advisory/ntap-20230703-0005/
secalert@redhathttps://support.apple.com/kb/HT213843
secalert@redhathttps://support.apple.com/kb/HT213844
secalert@redhathttps://support.apple.com/kb/HT213845
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/47
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/48
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2023/Jul/52
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-2953
af854a3a-2127-422b-91ae-364da2661108https://bugs.openldap.org/show_bug.cgi?id=9904
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230703-0005/

Vendor Advisories for CVE-2023-2953(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2023-2953
Microsoft Security Response Center (MSRC)
CVE-2023-2953

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	slapi-dev (2.5.16+dfsg-0ubuntu0.22.04.2) @ jammy	2026-05-25	ubuntu
ubuntu	slapd (2.4.42+dfsg-2ubuntu3.13+esm2) @ xenial	2026-05-25	ubuntu
redhat	openldap-0:2.6.2-3.el9_2.1	2025-05-27	redhat
redhat	openldap-0:2.6.2-1.el9_0.1	2025-05-27	redhat
redhat	openldap-0:2.4.46-20.el8_8	2024-08-29	redhat
redhat	openldap-0:2.4.46-19.el8_10	2024-07-02	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

Additional Vendor Advisories

(6)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 17× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-06 13:46 UTCepss_batch
2026-06-06 13:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-05 06:09 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-04 13:11 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2023-2953?

CVE-2023-2953 is a high vulnerability published on May 30, 2023. A vulnerability was found in openldap. This security flaw causes a null pointer dereference in bermemallocx() function.

When was CVE-2023-2953 disclosed?

CVE-2023-2953 was first published in the National Vulnerability Database on May 30, 2023, with the most recent update on January 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-2953 actively exploited?

CVE-2023-2953 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-2953?

CVE-2023-2953 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-2953?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-2953, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-2953

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CVE-2023-2953

Published

Last Modified

References (18)

Vendor Advisories for CVE-2023-2953(1)

Patch Availability(6)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-2953?

Same vendor

Same CWE

CVE-2023-2953

📅 Published

🔄 Last Modified

🔗 References (18)

📣 Vendor Advisories for CVE-2023-2953(1)

Patch Availability(6)

Weakness Classification(1)

Additional Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-2953?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (18)

Vendor Advisories for CVE-2023-2953(1)

Frequently asked(5)

Related CVEs(same vendor + same CWE)