CVE-2025-2849

Name: CVE-2025-2849
Creator: NVD / NIST
Published: 2025-03-27T14:15:55.303+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.8/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2025-2849 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. A vulnerability, which was classified as problematic, was found in UPX up to 5.0.0. Affected is the function PackLinuxElf64::un_DT_INIT of the file src/p_lx_elf.cpp. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

A vulnerability, which was classified as problematic, was found in UPX up to 5.0.0. Affected is the function PackLinuxElf64::un_DT_INIT of the file src/p_lx_elf.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The patch is identified as e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2. It is recommended to apply a patch to fix this issue.

Metrics

CVSS 3.1

5.5/10

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

CVSS 4.0

4.8/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.26%

16.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Upx	Upx	<= 5.0.0

References

https://github.com/upx/upx/commit/e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2Patch
https://github.com/upx/upx/issues/898Exploit, Issue Tracking
https://github.com/upx/upx/issues/898#issuecomment-2734082143Exploit, Issue Tracking
https://github.com/user-attachments/files/19307868/input.zipProduct
https://vuldb.com/?ctiid.301494Permissions Required, VDB Entry
https://vuldb.com/?id.301494Third Party Advisory, VDB Entry
https://vuldb.com/?submit.522371Third Party Advisory, VDB Entry
https://github.com/upx/upx/issues/898#issuecomment-2734082143Exploit, Issue Tracking

Timeline

Published: Mar 27, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-2849?

How severe is CVE-2025-2849?

CVE-2025-2849 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2025-2849?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-2849?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST