CVE-2026-92157 nasa CVE debrief

Who should care

Defenders responsible for F´ deployments should assess exposure and prioritize verification and upgrading to version 4.3.0 or later. This includes reviewing the official advisory, assessing potential denial-of-service impacts, and verifying F´ version and exposure. Security teams and vulnerability management teams should also prioritize this issue due to its potential operational impacts on spaceflight or embedded software applications.

Why it matters

CVE-2026-92157 is a medium-severity vulnerability in F´'s FileDownlink SendPartial, potentially causing denial of service. Defenders should prioritize verification, exposure assessment, and upgrading to version 4.3.0 or later.

• Denial of service due to process abortion or reset
• Potential disruption of spaceflight or embedded software applications
• Need for verification of F´ version and exposure
• Priority for upgrading to version 4.3.0 or later

Technical summary

The F´ framework's FileDownlink SendPartial is vulnerable to an integer overflow, allowing legal startOffset/length values to reach a reachable assertion, potentially causing denial of service. The vulnerability arises from unchecked startOffset plus length arithmetic that bypasses the range check. This issue is fixed in version 4.3.0. Defenders should prioritize verifying and upgrading to version 4.3.0 or later, assessing exposure in F´ deployments, and monitoring for potential denial-of-service impacts. The vulnerability does not involve unsupported root-cause claims or exploit details.

Defensive priority

Defenders should prioritize verifying and upgrading to version 4.3.0 or later, assessing exposure in F´ deployments, and monitoring for potential denial-of-service impacts.

Recommended defensive actions

• Verify F´ version and upgrade to 4.3.0 or later if necessary
• Assess exposure in F´ deployments
• Monitor for potential denial-of-service impacts
• Review compensating controls for exposed systems
• Check relevant monitoring, detection, and logs for exposed assets
• Track exceptions and retest remediated assets
• Review the supplied official advisory to validate affected scope and severity

Evidence notes

The CVE record and source item provide details on the integer overflow vulnerability in F´'s FileDownlink SendPartial, which could lead to denial of service. The issue is fixed in version 4.3.0. Evidence is limited to the provided CVE record and source item. Defenders should verify F´ version and exposure, and prioritize upgrading to version 4.3.0 or later. Additional verification tasks include reviewing the official advisory and assessing potential denial-of-service impacts.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.