Buffer overflow in Nasa Cfs
CVE-2026-5475
A vulnerability was determined in NASA cFS up to 7.0.0. This impacts the function CFE_SB_TransmitMsg of the file cfe_sb_priv.c of the component CCSDS Header Size Handler. Executing a manipulation can lead to memory corruption. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (24.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.3% 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/953 (issue-tracking, Issue Tracking)
- vuldb.com/submit/781951 (Third Party Advisory, VDB Entry, third-party-advisory)
- vuldb.com/vuln/355079 (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- vuldb.com/vuln/355079/cti (signature, Permissions Required, permissions-required, VDB Entry)
Frequently asked questions
- What is CVE-2026-5475?
- CVE-2026-5475 is a medium-severity vulnerability in Nasa Cfs, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.5/10. Published 2026-04-03.
- How severe is CVE-2026-5475?
- Medium severity. CVSS v3 base score is 5.5 out of 10.