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.
Published: 2026-08-30
Score: 5.3 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

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'}

Subscriptions

Nasa Cfs
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

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

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

Link: CVE-2026-82480

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

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

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

Link: CVE-2026-82480

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-30T06:30:07Z

Weaknesses