CVE-2026-82480

HIGH 7.4

NASA cFS cFE Software Bus cfe_sb_util.c CFE_SB_GetUserDataLength integer underflow

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-191 CWE-189
Vendor	nasa
Product	cfs
Published	Aug 30, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

NASA / cFS

7.0.0 7.0.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/397030 vuldb.com: https://vuldb.com/vuln/397030/cti vuldb.com: https://vuldb.com/cve/CVE-2026-82480 vuldb.com: https://vuldb.com/submit/888018

Credits

🔍 juntheworld (VulDB User) VulDB CNA Team