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Vulnerability record · CVE-2018-13844 · published 10 July 2018

CVE-2018-13844: Htslib memory leak vulnerability

HHtslib · Htslib

An issue has been found in HTSlib 1.8. It is a memory leak in fai_read in faidx.c. NOTE: This has been disputed with the assertion that this vulnerability exists in the test harness and HTSlib users would be aware of the need to destruct this object returned by fai_load() in their own code

7.5 CVSS 3.1 High EPSS 1.4% · top 27.9% CWE-401 · Memory leak
7.5CVSS 3.1 base score, v2 5.0
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

An issue has been found in HTSlib 1.8. It is a memory leak in fai_read in faidx.c. NOTE: This has been disputed with the assertion that this vulnerability exists in the test harness and HTSlib users would be aware of the need to destruct this object returned by fai_load() in their own code

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/samtools/htslib/issues/731#issuecomment-403675330 Third Party Advisory
https://github.com/samtools/htslib/issues/731#issuecomment-403675330 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-13845Htslib out-of-bounds read vulnerabilityAn issue has been found in HTSlib 1.8. It is a buffer over-read in sam_parse1 in sam.c.EPSS 1.6%9.8CVE-2017-1000206Htslib memory buffer overflow vulnerabilitysamtools htslib library version 1.4.0 and earlier is vulnerable to buffer overflow in the CRAM rANS codec resulting in potential arbitrary code execu…EPSS 2.0%8.8CVE-2026-31968Htslib stack-based buffer overflow vulnerabilityHTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data using a…EPSS 0.52%8.8CVE-2026-31963Htslib heap-based buffer overflow vulnerabilityHTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. As one…EPSS 0.52%8.8CVE-2026-31962Htslib heap-based buffer overflow vulnerabilityHTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. While …EPSS 0.59%8.8CVE-2020-36403Htslib out-of-bounds write vulnerabilityHTSlib through 1.10.2 allows out-of-bounds write access in vcf_parse_format (called from vcf_parse and vcf_read).EPSS 1.6%7.5CVE-2018-13843Htslib vulnerabilityAn issue has been found in HTSlib 1.8. It is a memory leak in bgzf_getline in bgzf.c. NOTE: the software maintainer's position is that the "failure t…EPSS 1.5%7.1CVE-2026-31971Htslib stack-based buffer overflow vulnerabilityHTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data using a…EPSS 0.52%

Source: NIST National Vulnerability Database (record CVE-2018-13844), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.