UBUNTU-CVE-2026-31973 (CVE-2026-31973)
Vulnerability from osv_ubuntu – Published: 2026-03-18 21:16 – Updated: 2026-05-20 15:27 – Source website
VLAI
Details
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
7.5 (High)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "0.1.19-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@0.1.19-1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1.19-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "0.1.19-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@0.1.19-1ubuntu1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1.19-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.7-1"
},
{
"binary_name": "samtools-test",
"binary_version": "1.7-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.7-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.4.1-1build1",
"1.5-1build1",
"1.6-3ubuntu1",
"1.6-4",
"1.7-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.10-3"
},
{
"binary_name": "samtools-test",
"binary_version": "1.10-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.10-3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9-4",
"1.9-5",
"1.9-6",
"1.9-7",
"1.10-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.13-4"
},
{
"binary_name": "samtools-test",
"binary_version": "1.13-4"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.13-4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.13-2",
"1.13-4"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.19.2-1build2"
},
{
"binary_name": "samtools-test",
"binary_version": "1.19.2-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.19.2-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.17-1",
"1.18-1",
"1.19-1",
"1.19.2-1",
"1.19.2-1build1",
"1.19.2-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.21-1"
},
{
"binary_name": "samtools-test",
"binary_version": "1.21-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.21-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.21-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "samtools",
"binary_version": "1.22.1-1"
},
{
"binary_name": "samtools-test",
"binary_version": "1.22.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "samtools",
"purl": "pkg:deb/ubuntu/samtools@1.22.1-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.21-1",
"1.22.1-1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-31973",
"modified": "2026-05-20T15:27:20Z",
"published": "2026-03-18T21:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-31973"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-31973"
},
{
"type": "REPORT",
"url": "https://github.com/samtools/samtools/security/advisories/GHSA-x86f-q6fj-cm43"
},
{
"type": "REPORT",
"url": "https://github.com/samtools/samtools/commit/06fc2a219b3d7c94d3f412c09f6d1efd51199f2f"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2026/03/18/12"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "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",
"type": "CVSS_V4"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-31973"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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