A security flaw has been discovered in NASA cFS up to 7.0.1. The affected element is the function CFE_SB_GetUserDataLength of the file src/cFS/cfe/modules/sb/fsw/src/cfe_sb_util.c of the component cFE Software Bus. Performing a manipulation of the argument TotalMsgSize/HdrSize results in integer underflow. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact Low

Subsequent System Integrity Impact Low

Subsequent System Availability Impact Low

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Nasa
  • Cfs

No data.

No data.

References
Link Providers
https://vuldb.com/cve/CVE-2026-82480 cve-icon cve-icon
https://vuldb.com/submit/888018 cve-icon cve-icon cve-icon
https://vuldb.com/vuln/397030 cve-icon cve-icon
https://vuldb.com/vuln/397030/cti cve-icon cve-icon
History

Mon, 31 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Sun, 30 Aug 2026 05:45:00 +0000

Type Values Removed Values Added
Description A security flaw has been discovered in NASA cFS up to 7.0.1. The affected element is the function CFE_SB_GetUserDataLength of the file src/cFS/cfe/modules/sb/fsw/src/cfe_sb_util.c of the component cFE Software Bus. Performing a manipulation of the argument TotalMsgSize/HdrSize results in integer underflow. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Title NASA cFS cFE Software Bus cfe_sb_util.c CFE_SB_GetUserDataLength integer underflow
First Time appeared Nasa
Nasa cfs
Weaknesses CWE-189
CWE-191
CPEs cpe:2.3:a:nasa:cfs:*:*:*:*:*:*:*:*
Vendors & Products Nasa
Nasa cfs
References
Metrics cvssV2_0

{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:ND/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.4, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:X/RL:X/RC:R'}

cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:X/RL:X/RC:R'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-08-30T05:30:09.275Z

Updated: 2026-08-31T17:06:07.604Z

Reserved: 2026-08-29T14:40:28.151Z

Link: CVE-2026-82480

cve-icon Vulnrichment

Updated: 2026-08-31T17:06:02.791Z

cve-icon NVD

Status : Deferred

Published: 2026-08-30T06:16:56.730

Modified: 2026-09-01T20:48:22.513

Link: CVE-2026-82480

cve-icon Redhat

No data.