CVE-2026-35091
NixOS vulnerability analysis and mitigation

A flaw was found in Corosync. A remote unauthenticated attacker can exploit a wrong return value vulnerability in the Corosync membership commit token sanity check by sending a specially crafted User Datagram Protocol (UDP) packet. This can lead to an out-of-bounds read, causing a denial of service (DoS) and potentially disclosing limited memory contents. This vulnerability affects Corosync when running in totemudp/totemudpu mode, which is the default configuration.


SourceNVD

Related NixOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-21010HIGH7.8
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NoNoApr 13, 2026
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CVE-2026-21011MEDIUM5.4
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CVE-2026-21008MEDIUM5.1
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CVE-2026-21007MEDIUM4.4
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NoNoApr 13, 2026

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