HOMEVULNERABILITIESCVE-2025-2849
MEDIUM

CVE-2025-2849

CWE-119Published: March 27, 2025· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-2849 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

upx1 product(s)
upx
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/upx/upx/commit/e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2
ADVISORYhttps://vuldb.com/?id.301494
ADVISORYhttps://vuldb.com/?submit.522371

All References (8)

→
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

Quick Facts

CVE IDCVE-2025-2849
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-119
CISA KEVNo
Affected1 vendor(s)
PublishedMar 27, 2025

Related CVEs (CWE-119)

CVE-2007-0886
10.0
CVE-2014-7187
10.0
CVE-2001-0803
10.0
CVE-2015-5547
10.0
CVE-2007-5466
10.0
CVE-1999-0874
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2025-2849 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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