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I. Basic Information for CVE-2026-31967
Vulnerability Information

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Vulnerability Title
HTSlib CRAM reader has out-of-bounds read due to improper validation of input
Source: NVD (National Vulnerability Database)
Vulnerability Description
HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. In the `cram_decode_slice()` function called while reading CRAM records, the value of the mate reference id field was not validated. Later use of this value, for example when converting the data to SAM format, could result in the out of bounds array reads when looking up the corresponding reference name. If the array value obtained also happened to be a valid pointer, it would be interpreted as a string and an attempt would be made to write the data as part of the SAM record. This bug may allow information about program state to be leaked. It may also cause a program crash through an attempt to access invalid memory. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Vulnerability Title
HTSlib 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTSlib是samtools开源的一个C语言的库文件。 HTSlib 1.23.1之前版本、1.22.2之前版本和1.21.1之前版本存在输入验证错误漏洞,该漏洞源于cram_decode_slice函数中未验证配对参考ID字段,可能导致越界数组读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
samtoolshtslib < 1.21.1 -
II. Public POCs for CVE-2026-31967
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III. Intelligence Information for CVE-2026-31967
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