CVE-2026-31973 (GCVE-0-2026-31973)

Vulnerability from cvelistv5 – Published: 2026-03-18 20:34 – Updated: 2026-03-19 16:14
VLAI
Title
NULL pointer dereference in samtools cram-size
Summary
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.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 16:14 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
samtools samtools Affected: >= 1.17, < 1.21.1
Affected: >= 1.22, < 1.22.2
Affected: = 1.23
guessed Create a notification for this product.
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