Integer overflow in Nasa Cfs
CVE-2026-5476
A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexity of an attack is rather high. The exploitability is told to be difficult. A fix is planned for the upcoming version milestone of the project.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Nasa Cfs — versions 7.0
- Nasa Core Flight System
Weakness classification (CWE)
References
- github.com/nasa/cFS/ (Product, product)
- github.com/nasa/cFS/issues/954 (issue-tracking, Issue Tracking)
- vuldb.com/submit/781971 (Third Party Advisory, VDB Entry, third-party-advisory)
- vuldb.com/vuln/355080 (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- vuldb.com/vuln/355080/cti (signature, Permissions Required, permissions-required, VDB Entry)
Frequently asked questions
- What is CVE-2026-5476?
- CVE-2026-5476 is a medium-severity vulnerability in Nasa Cfs, classified under CWE-189. CVSS score: 4.6/10. Published 2026-04-03.
- How severe is CVE-2026-5476?
- Medium severity. CVSS v3 base score is 4.6 out of 10.