Buffer overflow in Upx
CVE-2025-2849
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (20.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Upx
- Upx — versions 5.0
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/upx/upx/issues/898 (issue-tracking, Exploit, Issue Tracking)
- github.com/upx/upx/issues/898 (issue-tracking, Exploit, Issue Tracking)
- github.com/user-attachments/files/19307868/input.zip (Product, exploit)
- github.com/upx/upx/commit/e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2 (Patch, patch)
Frequently asked questions
- What is CVE-2025-2849?
- CVE-2025-2849 is a low-severity vulnerability in Upx, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 3.3/10. Published 2025-03-27.
- How severe is CVE-2025-2849?
- Low severity. CVSS v3 base score is 3.3 out of 10.