Bug 2448860 (CVE-2026-31973) - CVE-2026-31973 samtools: SAMtools: Denial of Service due to NULL pointer dereference in cram-size command
Summary: CVE-2026-31973 samtools: SAMtools: Denial of Service due to NULL pointer dere...
Keywords:
Status: NEW
Alias: CVE-2026-31973
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-18 21:02 UTC by OSIDB Bzimport
Modified: 2026-03-19 11:52 UTC (History)
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Description OSIDB Bzimport 2026-03-18 21:02:22 UTC 
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.
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