How severe is CVE-2023-39741?

CVE-2023-39741 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-39741 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39741?

CVE-2023-39741 affects Long Range Zip Project Long Range Zip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39741?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-39741 published?

CVE-2023-39741 was published on 2023-08-17 and last updated on 2026-06-17.

CVE-2023-39741

CVE-2023-39741 is a medium-severity vulnerability in Long Range Zip Project Long Range Zip with a CVSS 3.x base score of 5.5. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Long Range Zip Project Long Range Zip
Published: 2023-08-17
Last modified: 2026-06-17

Description

lrzip v0.651 was discovered to contain a heap overflow via the libzpaq::PostProcessor::write(int) function at /libzpaq/libzpaq.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted file.

Frequently asked questions

What is CVE-2023-39741?: lrzip v0.651 was discovered to contain a heap overflow via the libzpaq::PostProcessor::write(int) function at /libzpaq/libzpaq.cpp. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted file.
How severe is CVE-2023-39741?: CVE-2023-39741 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-39741 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39741?: CVE-2023-39741 affects Long Range Zip Project Long Range Zip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39741?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-39741 published?: CVE-2023-39741 was published on 2023-08-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:long_range_zip_project:long_range_zip:0.651:*:*:*:*:*:*:*

More vulnerabilities in Long Range Zip Project Long Range Zip

CVE-2018-10685 — Critical (CVSS 9.8): In Long Range Zip (aka lrzip) 0.631, there is a use-after-free in the lzma_decompress_buf function of stream.c, which…
CVE-2021-33453 — High (CVSS 7.8): An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.
CVE-2017-8844 — High (CVSS 7.8): The read_1g function in stream.c in liblrzip.so in lrzip 0.631 allows remote attackers to cause a denial of service…
CVE-2018-11496 — Medium (CVSS 6.5): In Long Range Zip (aka lrzip) 0.631, there is a use-after-free in read_stream in stream.c, because decompress_file in…
CVE-2021-33451 — Medium (CVSS 5.5): An issue was discovered in lrzip version 0.641. There are memory leaks in fill_buffer() in stream.c.
CVE-2022-33067 — Medium (CVSS 5.5): Lrzip v0.651 was discovered to contain multiple invalid arithmetic shifts via the functions get_magic in lrzip.c and…

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