CVE-2023-23456

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 33.7% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-01-12 00:00Z3 YR AGO

Last updated

2024-12-11 19:02Z1 YR AGO

Reserved

2023-01-12

Assigning CNA

fedora

Record state

PUBLISHED

Severity

Medium (CVSS 5.3)

CNA CVSS vector

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

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

8524d04b05c62d70bbfa173d85de32e99314ef423a21279109c48cb261176dbc

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2160381
• github.comhttps://github.com/upx/upx/commit/510505a85cbe45e51fbd470f1aa8b02157c429d4
• github.comhttps://github.com/upx/upx/issues/632
• lists.fedoraproject.orgFEDORA-2023-8d91390935https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EL3BVKIGG3SH6I3KPOYQAWCBD4UMPOPI/vendor-advisory
• lists.fedoraproject.orgFEDORA-2023-89fdc22acehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TGEP3FBNRZXGLIA2B2ICMB32JVMPREFZ/vendor-advisory
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/12/msg00013.html