Incorrect Check of Function Return Value Affecting corosync/corosync package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-COROSYNCCOROSYNC-15924381
- published7 Apr 2026
- disclosed1 Apr 2026
- creditUnknown
Introduced: 1 Apr 2026
CVE-2026-35091 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Incorrect Check of Function Return Value in the check_memb_commit_token_sanity() function. An attacker can cause a denial of service and potentially access limited memory contents by sending a specially crafted UDP packet. This is only exploitable if the service is running in totemudp or totemudpu mode, which is the default configuration.
Workaround
This vulnerability can be mitigated by restricting network access to the service on UDP port 5405 to only trusted hosts or networks, or by disabling the service if it is not required.