What is the CVSS score of CVE-2026-31972?

CVE-2026-31972 has a CVSS 4.0 base score of 6.9 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N. EPSS exploitation probability: 0.0%.

Which versions of Samtools are affected by CVE-2026-31972?

Organizations using SAMtools should be aware of notable risk from CVE-2026-31972, a use-after-free vulnerability rated CVSS 6.9. Exploitation could compromise the security of affected deployments.. A patch is available.

Samtools CVE-2026-31972

EUVD-2026-12956 MEDIUM

Use After Free (CWE-416)

2026-03-18 GitHub_M

Denial Of Service Information Disclosure Use After Free Samtools Suse

6.9

CVSS 4.0

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

1.21.1

EUVD ID Assigned

Mar 18, 2026 - 21:00 euvd

EUVD-2026-12956

Analysis Generated

Mar 18, 2026 - 21:00 vuln.today

CVE Published

Mar 18, 2026 - 20:32 nvd

MEDIUM 6.9

DescriptionNVD

SAMtools is a program for reading, manipulating and writing bioinformatics file formats. The mpileup command outputs DNA sequences that have been aligned against a known reference. On each output line it writes the reference position, optionally the reference DNA base at that position (obtained from a separate file) and all of the DNA bases that aligned to that position. As the output is ordered by position, reference data that is no longer needed is discarded once it has been printed out. Under certain conditions the data could be discarded too early, leading to an attempt to read from a pointer to freed memory. This bug may allow information about program state to be leaked. It may also cause a program crash through an attempt to access invalid memory. This bug is fixed in versions 1.21.1 and 1.22. There is no workaround for this issue.

AnalysisAI

SAMtools mpileup command contains a use-after-free vulnerability in reference data management that can leak sensitive program state information or trigger application crashes when processing aligned DNA sequences. The vulnerability affects versions prior to 1.2 and requires no authentication or user interaction to exploit, though a patch is not yet available. …

RemediationAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-31972 vulnerability details – vuln.today

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