CVE-2023-23003

MEDIUMNVD 4.07.8▲

4.0

In the Linux kernel before 5.16, tools/perf/util/expr.c lacks a check for the hashmap__new return value.

CVSS v3: 4.0
EG Score: 7.8(medium)
EPSS: 32.2%
KEV: Not listed

Published

March 1, 2023

Last Modified

March 20, 2025

References (6)

cve@mitrehttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
cve@mitrehttps://github.com/torvalds/linux/commit/0a515a06c5ebfa46fee3ac519e418f801e718da4
cve@mitrehttps://security.netapp.com/advisory/ntap-20230331-0003/
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/0a515a06c5ebfa46fee3ac519e418f801e718da4
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20230331-0003/

Weakness Classification(1)

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

CWE-252Unchecked Return Value

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2023-230032023-03-10
In the Linux kernel before 5.16 tools/perf/util/expr.c lacks a check for the hashmap__new return value.

Data Freshness Timeline

(refreshed 14× 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.

2026-06-02 20:12 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-23003?

CVE-2023-23003 is a medium vulnerability published on March 1, 2023. In the Linux kernel before 5.16, tools/perf/util/expr.c lacks a check for the hashmapnew return value.

When was CVE-2023-23003 disclosed?

CVE-2023-23003 was first published in the National Vulnerability Database on March 1, 2023, with the most recent update on March 20, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-23003 actively exploited?

CVE-2023-23003 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-23003?

CVE-2023-23003 has a CVSS v3 base score of 4.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.8.

How do I remediate CVE-2023-23003?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-23003, 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-2023-23003

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