CVE-2026-31970
HighSummary
HTSlib to biblioteka do odczytu i zapisu formatów plików bioinformatycznych. W funkcji ładowania GZI `bgzf_index_load_hfile()` może wystąpić przepełnienie całkowite, co prowadzi do przydzielenia bufora o zerowej lub zbyt małej wielkości do przechowywania indeksu. W wyniku tego może dojść do przepełnienia bufora na stercie.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do awarii programu, nadpisania danych oraz struktur sterty w sposób nieprzewidziany przez program. Istnieje również możliwość uzyskania wykonania dowolnego kodu.
Recommendation
Zaleca się aktualizację do wersji 1.23.1, 1.22.2 lub 1.21.1, które zawierają poprawki eliminujące tę podatność.
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Original NVD description (English source)
HTSlib is a library for reading and writing bioinformatics file formats. GZI files are used to index block-compressed GZIP [BGZF] files. In the GZI loading function, `bgzf_index_load_hfile()`, it was possible to trigger an integer overflow, leading to an under- or zero-sized buffer being allocated to store the index. Sixteen zero bytes would then be written to this buffer, and, depending on the result of the overflow the rest of the file may also be loaded into the buffer as well. If the function did attempt to load the data, it would eventually fail due to not reading the expected number of records, and then try to free the overflowed heap buffer. Exploiting this bug causes a heap buffer overflow. If a user opens a file crafted to exploit this issue, it could lead to the program crashing, or overwriting of data and heap structures in ways not expected by the program. It may be possible to use this to obtain arbitrary code execution. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes
Vulnerability data from NVD (NIST) · CISA KEV · EPSS