How severe is CVE-2017-15056?

CVE-2017-15056 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-15056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-15056?

CVE-2017-15056 affects Upx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-15056?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-15056 published?

CVE-2017-15056 was published on 2017-10-06 and last updated on 2026-06-17.

CVE-2017-15056

CVE-2017-15056 is a high-severity vulnerability in Upx with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Upx
Published: 2017-10-06
Last modified: 2026-06-17

Description

p_lx_elf.cpp in UPX 3.94 mishandles ELF headers, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted binary file, as demonstrated by an Invalid Pointer Read in PackLinuxElf64::unpack().

Frequently asked questions

What is CVE-2017-15056?: p_lx_elf.cpp in UPX 3.94 mishandles ELF headers, which allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted binary file, as demonstrated by an Invalid Pointer Read in PackLinuxElf64::unpack().
How severe is CVE-2017-15056?: CVE-2017-15056 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-15056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-15056?: CVE-2017-15056 affects Upx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-15056?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-15056 published?: CVE-2017-15056 was published on 2017-10-06 and last updated on 2026-06-17.

References

https://github.com/upx/upx/issues/128

Affected products (1)

cpe:2.3:a:upx:upx:3.94:*:*:*:*:*:*:*

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