UBUNTU-CVE-2026-120757

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Source
https://ubuntu.com/security/CVE-2026-120757
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-120757
Upstream
Published
2026-11-03T16:17:00Z
Modified
2026-11-05T11:47:28Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

HDF5 through 2.2.0 contains a heap buffer over-read vulnerability in H5L__extern_traverse() in src/H5Lexternal.c, the default traversal callback for external links. The callback locates the target file name and object path within the link’s user data using strlen() without validating the buffer against its stored size (udata_size, which was marked unused). A crafted HDF5 file containing an external link whose data is not NULL-terminated, or is too short to hold both strings, causes strlen() to read past the end of the udata heap buffer, and the derived object path pointer may also point outside the buffer. The overrun is unbounded and continues until a zero byte is found. The flaw is triggered when the malicious link is traversed, for example when opening an object through it. An attacker who can get a user or application to access a crafted file can cause a denial of service, and adjacent heap contents may be incorporated into the external file name or object path the library attempts to open.

References

Affected packages

Ubuntu:22.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.10.6+repack-5
1.10.7+repack-4ubuntu1
1.10.7+repack-4ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-103",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-cpp-103",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-cpp-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-fortran-102",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-hl-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-hl-cpp-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-hl-fortran-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-103",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-cpp-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-fortran-102",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-cpp-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-fortran-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-103",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-cpp-103-1",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-fortran-102",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-cpp-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-fortran-100",
            "binary_version": "1.10.7+repack-4ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:24.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.10.8+repack1-1ubuntu1
1.10.10+repack-3ubuntu1
1.10.10+repack-3.1ubuntu3
1.10.10+repack-3.1ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-cpp-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-fortran-102t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-hl-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-hl-cpp-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-hl-fortran-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-cpp-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-fortran-102t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-hl-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-hl-cpp-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-mpich-hl-fortran-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-cpp-103-1t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-fortran-102t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-cpp-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-fortran-100t64",
            "binary_version": "1.10.10+repack-3.1ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:26.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.14.5+repack-3build1
1.14.5+repack-4
1.14.6+repack-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-fortran-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-hl-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-hl-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-hl-fortran-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-fortran-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-mpich-hl-fortran-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-fortran-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-cpp-310",
            "binary_version": "1.14.6+repack-2"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-fortran-310",
            "binary_version": "1.14.6+repack-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:26.10
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=stonking

Affected ranges

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

Affected versions

1.*
1.14.6+repack-2
2.*
2.2.0+repack-4
2.2.0+repack-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-fortran-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-hl-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-hl-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-hl-fortran-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-fortran-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-hl-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-hl-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-mpich-hl-fortran-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-fortran-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-cpp-320",
            "binary_version": "2.2.0+repack-5"
        },
        {
            "binary_name": "libhdf5-openmpi-hl-fortran-320",
            "binary_version": "2.2.0+repack-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:Pro:14.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

1.*
1.8.11-3ubuntu1
1.8.11-5ubuntu1
1.8.11-5ubuntu2
1.8.11-5ubuntu6
1.8.11-5ubuntu7
1.8.11-5ubuntu7.1
1.8.11-5ubuntu7.1+esm1
1.8.11-5ubuntu7.1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.8.11-5ubuntu7.1+esm2"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.8.11-5ubuntu7.1+esm2"
        },
        {
            "binary_name": "libhdf5-7",
            "binary_version": "1.8.11-5ubuntu7.1+esm2"
        },
        {
            "binary_name": "libhdf5-mpich2-7",
            "binary_version": "1.8.11-5ubuntu7.1+esm2"
        },
        {
            "binary_name": "libhdf5-openmpi-7",
            "binary_version": "1.8.11-5ubuntu7.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:Pro:16.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Fxenial

Affected ranges

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

Affected versions

1.*
1.8.15-patch1+docs-4
1.8.15-patch1+docs-5
1.8.16+docs-1
1.8.16+docs-2
1.8.16+docs-3
1.8.16+docs-3ubuntu1
1.8.16+docs-4
1.8.16+docs-4ubuntu1
1.8.16+docs-4ubuntu1.1
1.8.16+docs-4ubuntu1.1+esm1
1.8.16+docs-4ubuntu1.1+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        },
        {
            "binary_name": "libhdf5-10",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        },
        {
            "binary_name": "libhdf5-cpp-11",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        },
        {
            "binary_name": "libhdf5-mpich-10",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        },
        {
            "binary_name": "libhdf5-openmpi-10",
            "binary_version": "1.8.16+docs-4ubuntu1.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:Pro:18.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1.*
1.10.0-patch1+docs-4
1.10.0-patch1+docs-4ubuntu0.1~esm1
1.10.0-patch1+docs-4ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-100",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-cpp-100",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-mpich-100",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        },
        {
            "binary_name": "libhdf5-openmpi-100",
            "binary_version": "1.10.0-patch1+docs-4ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"
Ubuntu:Pro:20.04:LTS
hdf5

Package

Name
hdf5
Purl
pkg:deb/ubuntu/hdf5?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

1.*
1.10.4+repack-10
1.10.4+repack-11
1.10.4+repack-11ubuntu1
1.10.4+repack-11ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "hdf5-helpers",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "hdf5-tools",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-103",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-cpp-103",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-java",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-jni",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-mpich-103",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        },
        {
            "binary_name": "libhdf5-openmpi-103",
            "binary_version": "1.10.4+repack-11ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120757.json"