# CVE-2026-82479: NASA cFS buffer overflow in SBN TCP Module

Source: https://junglewise.ai/threats/cve-2026-82479-nasa-cfs-buffer-overflow-in-sbn-tcp-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-30. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-82479 · Severity: medium · CVSS 6.3 · Published 2026-08-30

NASA's cFS (core Flight Software) is a reusable flight software framework used in spacecraft and aerospace systems. A buffer overflow vulnerability in the TCP networking module could allow an attacker on the local network to crash the system or potentially execute arbitrary code, compromising mission-critical operations.

Vendors: [Nasa](https://junglewise.ai/threats/vendors/nasa).

## Quick answers

**Is CVE-2026-82479 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-82479 being exploited in the wild.

**How severe is CVE-2026-82479?** Medium severity, with a CVSS score of 6.3, published 30 August 2026.

**Which products and versions are affected?** Nasa cFS up to 7.0.1.

**Is there a fix for CVE-2026-82479?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-82479 attacked?** It is attacked from the adjacent network.

**Am I affected by CVE-2026-82479?** Check whether you run Nasa cFS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability exists in the OS_read function of the SBN (Software Bus Network) TCP Module in modules/protocol/tcp/fsw/src/sbn_tcp_if.c. The vulnerability is triggered through improper handling of the MsgSz argument, which fails to validate input size before writing to a buffer. The attack vector is adjacent network, requiring the attacker to be on the local network. An attacker can cause a denial of service or potentially achieve code execution. No patch availability information is currently available; the vendor was contacted early but did not respond.

## Affected products

- NASA cFS up to 7.0.1

## Timeline

- 2026-08-30: disclosed

## References

- [https://vuldb.com/cve/CVE-2026-82479](https://vuldb.com/cve/CVE-2026-82479)
- [https://vuldb.com/submit/888017](https://vuldb.com/submit/888017)

## Related threats

- [NASA cFS integer underflow in CFE_SB_GetUserDataLength](https://junglewise.ai/threats/cve-2026-82480-nasa-cfs-integer-underflow-in-cfe-sb-getuserdatalength)