CVE Watch26 oct 2026

CVE-2026-116742

HTSlib through 1.24 contains a heap out-of-bounds write and read vulnerability in bgzf_index_load_hfile() in bgzf.c that allows attackers to

CVSS

4.4

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 26 oct 2026 · Última mod.: 26 oct 2026 · CWE-197

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

HTSlib through 1.24 contains a heap out-of-bounds write and read vulnerability in bgzf_index_load_hfile() in bgzf.c that allows attackers to corrupt heap memory by supplying a crafted .gzi index entry count. A count of 0xFFFFFFFF truncates noffs to zero, causing writes past a malloc(0) buffer and an offs[-1] read in bgzf_useek(), resulting in heap corruption or crashes in tools like samtools and bcftools.

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