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Vulnerabilities

Vulnerability · CVE-2026-103222

A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2.

Published Sep 30, 2026 · catalog updated Oct 15, 2026 · A vulnerability was determined

Check if you run it

No confirmed exploitation is on record for CVE-2026-103222. EPSS is 0.28%. Act only if a listed version of A vulnerability was determined is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A vulnerability was determined).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.28%
Remediation
Advisory link
Affected products
Debian:13 c-blosc2 · Debian:14 c-blosc2

A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will fix this issue. This patch is called fe2964d114d97847f56570a0ab2be2c57ccbeedc. The affected component should be upgraded.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:13 c-blosc22.17.1+ds-1, 2.17.1+ds-2, 2.22.0+ds-1
  • Debian:14 c-blosc20 → 3.3.5-1

How to fix CVE-2026-103222

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-103222. EPSS is 0.28%. Act only if a listed version of A vulnerability was determined is installed.

Which versions are affected?

Compare what you have installed with 2.17.1+ds-1, 2.17.1+ds-2, 2.22.0+ds-1, 0 → 3.3.5-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 30, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will f

  2. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    c-blosc2 fixed in 3.3.5-1

  3. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    c-blosc2 fixed in 3.3.5-1

  4. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will f

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.