UBUNTU-CVE-2026-31962

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Source
https://ubuntu.com/security/CVE-2026-31962
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-31962
Upstream
Published
2026-03-18T18:16:00Z
Modified
2026-05-20T16:25:18.904119853Z
Severity
  • 8.8 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

HTSlib is a library for reading and writing bioinformatics file formats. CRAM is a compressed format which stores DNA sequence alignment data. While most alignment records store DNA sequence and quality values, the format also allows them to omit this data in certain cases to save space. Due to some quirks of the CRAM format, it is necessary to handle these records carefully as they will actually store data that needs to be consumed and then discarded. Unfortunately the cram_decode_seq() did not handle this correctly in some cases. Where this happened it could result in reading a single byte from beyond the end of a heap allocation, followed by writing a single attacker-controlled byte to the same location. Exploiting this bug causes a heap buffer overflow. If a user opens a file crafted to exploit this issue, it could lead to the program crashing, or overwriting of data and heap structures in ways not expected by the program. It may be possible to use this to obtain arbitrary code execution. Versions 1.23.1, 1.22.2 and 1.21.1 include fixes for this issue. There is no workaround for this issue.

References

Affected packages

Ubuntu:20.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.9-10
1.9-11
1.9-12
1.10.2-2ubuntu1
1.10.2-2ubuntu2
1.10.2-3
1.10.2-3ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.10.2-3ubuntu0.1"
        },
        {
            "binary_name": "libhts3",
            "binary_version": "1.10.2-3ubuntu0.1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.10.2-3ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:22.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.13+ds-2
1.13+ds-2build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.13+ds-2build1"
        },
        {
            "binary_name": "libhts3",
            "binary_version": "1.13+ds-2build1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.13+ds-2build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:24.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.17+ds-1
1.18+ds-1
1.19+ds-1.1build2
1.19+ds-1.1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.19+ds-1.1build3"
        },
        {
            "binary_name": "libhts3t64",
            "binary_version": "1.19+ds-1.1build3"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.19+ds-1.1build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:25.10
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.21+ds-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.21+ds-1"
        },
        {
            "binary_name": "libhts3t64",
            "binary_version": "1.21+ds-1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.21+ds-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:26.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.21+ds-1
1.22.1+ds2-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.22.1+ds2-1"
        },
        {
            "binary_name": "libhts3t64",
            "binary_version": "1.22.1+ds2-1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.22.1+ds2-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:Pro:14.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.2.0~rc3-1
0.2.0~rc3-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "0.2.0~rc3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "libhts0",
            "binary_version": "0.2.0~rc3-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:Pro:16.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.1-1
1.2.1-2
1.2.1-2ubuntu1
1.2.1-2ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.2.1-2ubuntu1+esm1"
        },
        {
            "binary_name": "libhts1",
            "binary_version": "1.2.1-2ubuntu1+esm1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.2.1-2ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"
Ubuntu:Pro:18.04:LTS
htslib

Package

Name
htslib
Purl
pkg:deb/ubuntu/htslib?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.5-1
1.5-4ubuntu1
1.6-3ubuntu1
1.6-4
1.6-4build1
1.7-2
1.7-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "htslib-test",
            "binary_version": "1.7-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "libhts2",
            "binary_version": "1.7-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "tabix",
            "binary_version": "1.7-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-31962.json"