CVE-2025-2849: UPX p_lx_elf.cpp un_DT_INIT heap-based overflow

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-27 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

upx: through 5.0.0

References

https://github.com/upx/upx/commit/e0b6ff192412f5bb5364c1948f4f6b27a0cd5ea2
https://github.com/upx/upx/issues/898
https://github.com/upx/upx/issues/898#issuecomment-2734082143
https://github.com/user-attachments/files/19307868/input.zip
https://vuldb.com/?ctiid.301494
https://vuldb.com/?id.301494
https://vuldb.com/?submit.522371
https://github.com/upx/upx/issues/898#issuecomment-2734082143

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