CVE-2026-5476: A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit

Q: How do I fix CVE-2026-5476?

core flight system: upgrade to newer than 7.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-5476 being exploited?

CVE-2026-5476 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-5476 affect?

CVE-2026-5476 affects core flight system. Severity is medium (CVSS 4.6). A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexit

Q: How urgent is CVE-2026-5476?

Priority 19/100. No elevated risk signals yet.

Routine

MEDIUM 4.6UPGRADE

CVE-2026-5476 is a medium-severity flaw (CVSS 4.6) affecting core flight system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexity of an attack is rather high. The exploitability is told to be difficult. A fix is planned for the upcoming version milestone of the project.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
Attack vector	Adjacent network
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-189, CWE-190
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): VulDB · Vendor: nasa

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 18:16 UTCPublished CVE record published
2026-07-24 09:10 UTCUpdated Record last modified

nasa core flight system UPGRADE

Affected: <= 7.0.0

Fixed in: newer than 7.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy core-flight-system || rpm -q core-flight-system || core-flight-system --version

2. UPGRADE to newer than 7.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade core-flight-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade core-flight-system

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-5476?

core flight system: upgrade to newer than 7.0.0. Exact commands for each OS are on this page.

Is CVE-2026-5476 being exploited?

CVE-2026-5476 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-5476 affect?

CVE-2026-5476 affects core flight system. Severity is medium (CVSS 4.6). A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function CFE_TBL_ValidateCodecLoadSize of the file cfe/modules/tbl/fsw/src/cfe_tbl_passthru_codec.c. The manipulation leads to integer overflow. The complexit

How urgent is CVE-2026-5476?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2026-5474 MEDIUM 6.3 UPGRADE A vulnerability was found in NASA cFS up to 7.0.0
CVE-2026-5473 MEDIUM 4.5 UPGRADE A vulnerability has been found in NASA cFS up to 7.0.0
CVE-2026-5475 MEDIUM 5.5 UPGRADE A vulnerability was determined in NASA cFS up to 7.0.0

References

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