CVE-2026-41144: F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software

Routine

NONE 0.0REMOTEDOWNGRADE

CVE-2026-41144 is a none-severity flaw (CVSS 0.0) affecting fprime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to version 4.2.0, the bounds check byteOffset + dataSize > fileSize uses U32 addition that wraps around on overflow. An attacker-crafted DataPacket with byteOffset=0xFFFFFF9C and dataSize=100 overflows to 0, bypassing the check entirely. The subsequent file write proceeds at the original ~4GB offset. Additionally, Svc

Why this priority

Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	0.0 (None)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-190, CWE-787
Published	2026-04-22
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: nasa

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-22 00:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

nasa fprime DOWNGRADE

Affected: 4.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.1.1

1. Check installed version

apt-cache policy fprime || rpm -q fprime || fprime --version

2. No fixed release: DOWNGRADE to a release before 4.1.1 (Debian / Ubuntu)

apt-cache madison fprime sudo apt install fprime=<VERSION_BEFORE_4.1.1> sudo apt-mark hold fprime

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list fprime sudo dnf downgrade fprime-<VERSION_BEFORE_4.1.1> sudo dnf versionlock add fprime

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-41144?

fprime: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-41144 being exploited?

CVE-2026-41144 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-2026-41144 affect?

CVE-2026-41144 affects fprime. Severity is none (CVSS 0.0). F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to version 4.2.0, the bounds check byteOffset + dataSize > fileSize uses U32 addition that wraps around on ov

How urgent is CVE-2026-41144?

Priority 14/100. Remotely exploitable, no login, no user action

References

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