UBUNTU-CVE-2026-120756

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Source
https://ubuntu.com/security/CVE-2026-120756
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-120756.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-120756
Upstream
Published
2026-11-03T16:17:00Z
Modified
2026-11-05T11:47:27Z
Severity
  • 1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

HDF5 through 2.2.0 contains a heap buffer over-read vulnerability in H5O__chunk_deserialize() in src/H5Ocache.c. When decoding object header messages, the declared message size is checked against the end of the chunk image before the remainder of the message header (flags, and for version 2 object headers, the optional creation index) has been decoded. Because the message body begins after these fields, a message can start up to four bytes further into the chunk than the size check accounts for. A crafted HDF5 file can declare a message size that passes the check but extends past the end of the chunk image, causing the message’s decode callback, for example H5O__mtime_new_decode() in src/H5Omtime.c, to read beyond the heap allocation. The flaw is reachable during H5Fopen() on a crafted file. An attacker who can get a user or application to open a malicious file can cause a denial of service or limited disclosure of process memory.

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-2026-120756.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-2026-120756.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-2026-120756.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-2026-120756.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-2026-120756.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-2026-120756.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-2026-120756.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-2026-120756.json"