CVE-2026-82480 NASA cFS cFE Software Bus cfe_sb_util.c CFE_SB_GetUserDataLength integer underflow
Remote attackers can trigger an integer underflow in the cFE Software Bus, potentially causing a denial of service in NASA cFS systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82480?
CVE-2026-82480 is a medium-severity vulnerability in NASA cFS, published on 30 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-82480?
How do I fix CVE-2026-82480?
No fix has been published for CVE-2026-82480 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82480 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82480 exists.
Sources
Also known as GHSA-h35r-6hg6-mcg3.