Vulnerability · Published Oct 14, 2026 · Assigned by GitHub_M

CVE-2026-92156F´: EventManager asserts on legal oversized LogBuffer values delivered over the standard GenericHub event bridge

Medium 6.5

In plain English

A medium-severity security flaw in fprime from nasa. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 54.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to 4.3.0, Svc::EventManager loqQueue_internalInterfaceHandler packetization is vulnerable because EventManager accepts up to the framework LogBuffer maximum, but packet descriptor, event identifier, and time-tag metadata consume part of the larger ComBuffer and leave a smaller remaining budget for log arguments; serialization failure then reaches an assertion. When a deployment bridges events through GenericHub into EventManager and forwards a legal Fw::LogBuffer larger than EventManager remaining log-argument budget, under standard F Prime assertion handling, a legal bridged event payload aborts or resets the process, causing denial of service. This issue is fixed in version 4.3.0.

Affected products (as reported)

Vendor	Product	Versions
nasa	fprime	< 4.3.0

Weakness: CWE-131, CWE-617 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/nasa/fprime/security/advisories/GHSA-6fxx-mgfv-55g7 x_refsource_CONFIRM
https://github.com/nasa/fprime/pull/5633 x_refsource_MISC
https://github.com/nasa/fprime/commit/7eacd551aaf6d9a21e347ac2c8d827ca15ee5755 x_refsource_MISC
https://github.com/nasa/fprime/releases/tag/v4.3.0 x_refsource_MISC