NULL Pointer Dereference Affecting samtools/samtools package, versions [1.17,1.21.1)[1.22.0,1.22.2)[1.23.0,1.23.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Mar 2026
- disclosed18 Mar 2026
- creditUnknown
Introduced: 18 Mar 2026
CVE-2026-31973 (opens in a new tab)How to fix?
Upgrade samtools/samtools to version 1.21.1, 1.22.2, 1.23.1 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the cram-size command due to missing error handling after calling cram_decode_compression_header() function. An attacker can cause the application to crash by providing a specially crafted CRAM file that triggers a NULL pointer dereference.