Red Hat Security Advisory: yggdrasil security update
yggdrasil is a system daemon that subscribes to topics on an MQTT broker and routes any data received on the topics to an appropriate child "worker" process, exchanging data with its worker processes through a D-Bus message broker. Security Fix(es): * crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The yggdrasil daemon, which subscribes to MQTT topics and communicates with worker processes via D-Bus, is affected by three vulnerabilities in golang components it uses: CVE-2025-61729 (Denial of Service via crafted X.509 certificates causing excessive resource consumption), CVE-2025-61726 (Memory exhaustion in net/url query parameter parsing), and CVE-2025-68121 (Unexpected TLS session resumption). These vulnerabilities can cause denial of service or unexpected TLS behavior. Red Hat has issued a security advisory RHSA-2026:3506 with updated yggdrasil packages for Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. The advisory includes fixes for these issues and directs users to apply the update for remediation.
Potential Impact
The vulnerabilities can lead to denial of service conditions through excessive resource consumption (memory exhaustion) or unexpected TLS session resumption behavior, potentially disrupting normal operation of the yggdrasil daemon and its communication channels. No known exploits in the wild have been reported. The impact affects systems running the affected versions of yggdrasil on Red Hat Enterprise Linux 10.0 Extended Update Support and related builder variants.
Mitigation Recommendations
Red Hat has released updated yggdrasil packages addressing these vulnerabilities as part of advisory RHSA-2026:3506. Users should apply the provided security update to affected Red Hat Enterprise Linux 10.0 Extended Update Support systems and related CodeReady Linux Builder variants to remediate the issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified in the advisory.
Red Hat Security Advisory: yggdrasil security update
Description
yggdrasil is a system daemon that subscribes to topics on an MQTT broker and routes any data received on the topics to an appropriate child "worker" process, exchanging data with its worker processes through a D-Bus message broker. Security Fix(es): * crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The yggdrasil daemon, which subscribes to MQTT topics and communicates with worker processes via D-Bus, is affected by three vulnerabilities in golang components it uses: CVE-2025-61729 (Denial of Service via crafted X.509 certificates causing excessive resource consumption), CVE-2025-61726 (Memory exhaustion in net/url query parameter parsing), and CVE-2025-68121 (Unexpected TLS session resumption). These vulnerabilities can cause denial of service or unexpected TLS behavior. Red Hat has issued a security advisory RHSA-2026:3506 with updated yggdrasil packages for Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder variants. The advisory includes fixes for these issues and directs users to apply the update for remediation.
Potential Impact
The vulnerabilities can lead to denial of service conditions through excessive resource consumption (memory exhaustion) or unexpected TLS session resumption behavior, potentially disrupting normal operation of the yggdrasil daemon and its communication channels. No known exploits in the wild have been reported. The impact affects systems running the affected versions of yggdrasil on Red Hat Enterprise Linux 10.0 Extended Update Support and related builder variants.
Mitigation Recommendations
Red Hat has released updated yggdrasil packages addressing these vulnerabilities as part of advisory RHSA-2026:3506. Users should apply the provided security update to affected Red Hat Enterprise Linux 10.0 Extended Update Support systems and related CodeReady Linux Builder variants to remediate the issues. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No alternative mitigations or workarounds are specified in the advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:3506
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-61729","CVE-2025-68121"]
- Cvss Version
- null
Threat ID: 6a16096ae29bf47b506301c4
Added to database: 05/26/2026, 20:58:18 UTC
Last enriched: 07/30/2026, 08:07:19 UTC
Last updated: 07/31/2026, 19:30:12 UTC
Views: 77
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