How severe is CVE-2024-3094?

CVE-2024-3094 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-3094 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 86% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-3094?

CVE-2024-3094 primarily affects Tukaani Xz. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-3094?

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

Does CVE-2024-3094 have an EU (EUVD) identifier?

Yes. CVE-2024-3094 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31700.

When was CVE-2024-3094 published?

CVE-2024-3094 was published on 2024-03-29 and last updated on 2026-06-17.

CVE-2024-3094

CVE-2024-3094 is a critical-severity vulnerability in Tukaani Xz with a CVSS 3.x base score of 10.0. Its EPSS exploit-prediction score of 86% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-506.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 86% (100th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-31700
Weakness: CWE-506
Affected product: Tukaani Xz
Published: 2024-03-29
Last modified: 2026-06-17

Description

Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.

Frequently asked questions

What is CVE-2024-3094?: Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.
How severe is CVE-2024-3094?: CVE-2024-3094 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-3094 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 86% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-3094?: CVE-2024-3094 primarily affects Tukaani Xz. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-3094?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-3094 have an EU (EUVD) identifier?: Yes. CVE-2024-3094 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31700.
When was CVE-2024-3094 published?: CVE-2024-3094 was published on 2024-03-29 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:tukaani:xz:5.6.0:*:*:*:*:*:*:*
cpe:2.3:a:tukaani:xz:5.6.1:*:*:*:*:*:*:*

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