CVE-2023-2603

HIGHNVD 7.87.8—

7.8

A vulnerability was found in libcap. This issue occurs in the _libcap_strdup() function and can lead to an integer overflow if the input string is close to 4GiB.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 78.6%
KEV: Not listed

Published

June 6, 2023

Last Modified

December 2, 2025

References (8)

secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2209113
secalert@redhathttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZ57ICDLMVYEREXQGZWL4GWI7FRJCRQT/
secalert@redhathttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPEGCFMCN5KGCFX5Y2VTKR732TTD4ADW/
secalert@redhathttps://www.x41-dsec.de/static/reports/X41-libcap-Code-Review-2023-OSTIF-Final-Report.pdf
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2209113
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EZ57ICDLMVYEREXQGZWL4GWI7FRJCRQT/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IPEGCFMCN5KGCFX5Y2VTKR732TTD4ADW/
af854a3a-2127-422b-91ae-364da2661108https://www.x41-dsec.de/static/reports/X41-libcap-Code-Review-2023-OSTIF-Final-Report.pdf

Patch Availability(6)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libcap-dev (1:2.66-3ubuntu2.1) @ lunar	2026-05-24	ubuntu
ubuntu	libcap-dev (1:2.24-12ubuntu0.1~esm1) @ xenial	2026-05-24	ubuntu
redhat	libcap-0:2.48-8.el9_0.1	2024-01-25	redhat
redhat	libcap-0:2.48-4.el8_6	2023-11-21	redhat
redhat	libcap-0:2.48-9.el9_2	2023-09-12	redhat
redhat	libcap-0:2.48-5.el8_8	2023-08-08	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-190Integer Overflow or Wraparound

All Vendor Advisories

(7)

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.

Data Freshness Timeline

(refreshed 15× 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.

2026-06-05 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
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2026-05-29 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch

Frequently asked(5)

What is CVE-2023-2603?

CVE-2023-2603 is a high vulnerability published on June 6, 2023. A vulnerability was found in libcap. This issue occurs in the libcapstrdup() function and can lead to an integer overflow if the input string is close to 4GiB.

When was CVE-2023-2603 disclosed?

CVE-2023-2603 was first published in the National Vulnerability Database on June 6, 2023, with the most recent update on December 2, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-2603 actively exploited?

CVE-2023-2603 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-2603?

CVE-2023-2603 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2023-2603?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-2603, 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

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CVE-2023-2603

Published

Last Modified

References (8)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-2603?

Same vendor

Same CWE

CVE-2023-2603

📅 Published

🔄 Last Modified

🔗 References (8)

Patch Availability(6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-2603?

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References (8)

Frequently asked(5)

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