CVE-2026-103222

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 20.0% of scored records. A rank, not a probability.

NVD base score

6.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-30.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-30 14:00Z28 DAYS AGO

Last updated

2026-09-30 16:26Z28 DAYS AGO

Reserved

2026-09-30

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X

Weaknesses

• CWE-189
• CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

a429d099794609f257a52ac6e3ae7384ac32d5960dae0b7c91c4a558d235879c

• vuldb.comVDB-411905 | Blosc C-Blosc2 blosclz Decompression blosclz.c blosclz_decompress integer overflowhttps://vuldb.com/vuln/411905vdb-entrytechnical-description
• vuldb.comVDB-411905 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/vuln/411905/ctisignaturepermissions-required
• vuldb.comCVE-2026-103222 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-103222third-party-advisory
• vuldb.comSubmit #954976 | Blosc c-blosc2 >= 2.0.0, < fix commit fe2964d114d9 Memory Corruptionhttps://vuldb.com/submit/954976third-party-advisory
• github.comhttps://github.com/Blosc/c-blosc2/commit/fe2964d114d97847f56570a0ab2be2c57ccbeedcpatch
• github.comhttps://github.com/Blosc/c-blosc2/releases/tag/v3.3.3patch
• github.comhttps://github.com/Blosc/c-blosc2/product