Summary
Talos vulnerable dependency due to race condition in Linux kernel's IP framework XFRM
Workarounds
Audit kubernetes workloads running in the cluster with privileged: true set or having NET_ADMIN capability and assess the threat vector.
References
For more information
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Impact
A race condition was found in the Linux kernel's IP framework for transforming packets (XFRM subsystem) when multiple calls to xfrm_probe_algs occurred simultaneously. This flaw could allow a local attacker to potentially trigger an out-of-bounds write or leak kernel heap memory by performing an out-of-bounds read and copying it into a socket.
Multiple concurrent operations access a shared resource without proper synchronization, producing unpredictable results depending on timing. Typical impact: TOCTOU exploits, data corruption, or privilege escalation.
GHSA-34VW-M4RH-R36P has a CVSS score of 7.0 (High). The vector is requires local access, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.2.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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The fix has been backported to 5.15.64 version of the upstream Linux kernel (5.15 is the upstream Kernel long term version Talos ships with). Talos >= v1.2.0 is shipped with Linux Kernel 5.15.64 fixing the above issue.
Kubernetes workloads running in Talos are not affected since user namespaces are disabled in Talos kernel config. So an unprivileged user cannot obtain CAP_NET_ADMIN by unsharing. However untrusted workloads that run with privileged: true or having NET_ADMIN capability poses a risk.
Frequently Asked Questions
- What is GHSA-34VW-M4RH-R36P? GHSA-34VW-M4RH-R36P is a high-severity race condition vulnerability in github.com/talos-systems/talos (go), affecting versions < 1.2.0. It is fixed in 1.2.0. Multiple concurrent operations access a shared resource without proper synchronization, producing unpredictable results depending on timing.
- How severe is GHSA-34VW-M4RH-R36P? GHSA-34VW-M4RH-R36P has a CVSS score of 7.0 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of github.com/talos-systems/talos are affected by GHSA-34VW-M4RH-R36P? github.com/talos-systems/talos (go) versions < 1.2.0 is affected.
- Is there a fix for GHSA-34VW-M4RH-R36P? Yes. GHSA-34VW-M4RH-R36P is fixed in 1.2.0. Upgrade to this version or later.
- Is GHSA-34VW-M4RH-R36P exploitable, and should I be worried? Whether GHSA-34VW-M4RH-R36P is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-34VW-M4RH-R36P is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-34VW-M4RH-R36P? Upgrade
github.com/talos-systems/talosto 1.2.0 or later.