CVE-2026-31973

samtools: SAMtools is a program for reading, manipulating and writing bioinformatics file formats

CVE-2026-31973 is fixed in samtools on 1 platform by DEBIAN-CVE-2026-31973 (version 1.24-2), released March 18, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0056
46th percentile

SAMtools is a program for reading, manipulating and writing bioinformatics file formats. Starting in version 1.17, in the cram-size command, used to write information about how well CRAM files are compressed, a check to see if the `cram_decode_compression_header()` was missing. If the function returned an error, this could lead to a NULL pointer dereference. Exploiting this bug causes a NULL pointer dereference. Typically this will cause the program to crash. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.

Where it's fixed

ProductFixed inFixReleased
Linux
samtools · Debian 14 1.24-2 DEBIAN-CVE-2026-31973 Mar 18, 2026

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