UBUNTU-CVE-2026-122330

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Source
https://ubuntu.com/security/CVE-2026-122330
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-122330
Upstream
Published
2026-11-06T00:00:00Z
Modified
2026-11-07T01:46:28Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c that allows attackers to crash applications by supplying crafted frames with unchecked zero chunksize or blocksize values. Attackers can provide a malicious Blosc2 frame opened via blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a slice, raising SIGFPE and terminating the process.

References

Affected packages

Ubuntu:24.04:LTS / c-blosc2

Package

Name
c-blosc2
Purl
pkg:deb/ubuntu/c-blosc2?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.12.0+ds-1
2.12.0+ds-2
2.13.1+ds-1
2.13.1+ds-1ubuntu1
2.13.1+ds-1.1ubuntu1
2.13.1+ds-1.1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libblosc2-2t64",
            "binary_version": "2.13.1+ds-1.1ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"

Ubuntu:26.10 / c-blosc2

Package

Name
c-blosc2
Purl
pkg:deb/ubuntu/c-blosc2?arch=source&distro=stonking

Affected ranges

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

Affected versions

2.*
2.23.0+ds-1
2.23.1+ds-1
2.23.1+ds-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libblosc2-7",
            "binary_version": "2.23.1+ds-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"

Ubuntu:26.04:LTS / c-blosc2

Package

Name
c-blosc2
Purl
pkg:deb/ubuntu/c-blosc2?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.17.1+ds-2
2.22.0+ds-1
2.23.0+ds-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libblosc2-7",
            "binary_version": "2.23.0+ds-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-122330.json"