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CVE-2023-2603

24
FAUCET Score

CVE-2023-2603 is a high-severity integer overflow vulnerability in the _libcap_strdup() function of the libcap library, affecting products from Debian, Fedora, Red Hat, and the libcap project. With a CVSS score of 7.8, it allows a local, low-privileged attacker to achieve high confidentiality, integrity, and availability impacts with low attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.69CPE matchmatch criteria
cpe:2.3:a:libcap_project:libcap:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
37CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
38CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
44.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 83rd percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia msrc
Product: cm1 libcap 2.26-3 on CBL Mariner 1.0Fixed in: 2.26-3
microsoftpatch availablevia msrc
Product: cbl2 libcap 2.60-2 on CBL Mariner 2.0Fixed in: 2.60-2
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libcap-0:2.48-5.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: libcap-0:2.48-4.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: libcap-0:2.48-9.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: libcap-0:2.48-8.el9_0.1
View patch

Vendor Advisories (2)

microsoft2023-Jun/CVE-2023-2603Important

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.

Jun 13, 2023
redhatCVE-2023-2603Moderate

libcap: Integer Overflow in _libcap_strdup()

May 16, 2023

References

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/EZ57ICDLMVYEREXQGZWL4GWI7FRJCRQT
Broken LinkThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IPEGCFMCN5KGCFX5Y2VTKR732TTD4ADW
Broken LinkThird Party Advisory
x41-dsec.de / static/reports/X41-libcap-Code-Review-2023-OSTIF-Final-Report.pdf
ExploitTechnical Description