CVE-2018-11243
CVSS v3
7.8
HIGH
EPSS Score
2.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.
Technical details
- Published
- 2018-05-18
Frequently asked questions
What is CVE-2018-11243?
PackLinuxElf64::unpack in p_lx_elf.cpp in UPX 3.95 allows remote attackers to cause a denial of service (double free), limit the ability of a malware scanner to operate on the entire original data, or possibly have unspecified other impact via a crafted file.
Is CVE-2018-11243 actively exploited?
Active exploitation of CVE-2018-11243 has not been confirmed. Its EPSS score was 2.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-11243?
CVE-2018-11243 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2018-11243 affecting your environment?
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