Vulnerability · Published Apr 3, 2026 · Assigned by VulDB
CVE-2026-5475NASA cFS CCSDS Header Size cfe_sb_priv.c CFE_SB_TransmitMsg memory corruption
Medium 5.5
In plain English
A medium-severity memory corruption in cFS from NASA. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-119 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:R
References
- VDB-355079 | NASA cFS CCSDS Header Size cfe_sb_priv.c CFE_SB_TransmitMsg memory corruption vdb-entry, technical-description
- VDB-355079 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #781951 | NASA cFS 7.0.0 CFE_SB_TransmitMsg memcpy trusts CCSDS header size without sourc third-party-advisory
- https://github.com/nasa/cFS/issues/953 issue-tracking
- https://github.com/nasa/cFS/ product