Dell PowerScale OneFS TOCTOU DoS via Adjacent Net Attacker (9.5-9.12)
CVE-2026-22281 Published on January 22, 2026
Dell PowerScale OneFS, versions 9.5.0.0 through 9.5.1.5, versions 9.6.0.0 through 9.7.1.10, versions 9.8.0.0 through 9.10.1.3, versions starting from 9.11.0.0 and prior to 9.13.0.0, contains a Time-of-check Time-of-use (TOCTOU) race condition vulnerability. A low privileged attacker with adjacent network access could potentially exploit this vulnerability, leading to denial of service.
Vulnerability Analysis
Weakness Type
What is a TOCTTOU Vulnerability?
The software checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the software to perform invalid actions when the resource is in an unexpected state. This weakness can be security-relevant when an attacker can influence the state of the resource between check and use. This can happen with shared resources such as files, memory, or even variables in multithreaded programs.
CVE-2026-22281 has been classified to as a TOCTTOU vulnerability or weakness.
Products Associated with CVE-2026-22281
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Affected Versions
Dell PowerScale OneFS:- Before 9.13.0.0 is affected.
- Before 9.5.1.6 is affected.
- Before 9.7.1.11 is affected.
- Before 9.10.1.4 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.