Around the time that some OpenAI models escaped their test environment and hacked Hugging Face, some agents exploited a vulnerability in the Linux kernel to escalate privileges on OpenAI’s own systems.
This was mentioned in a report published this week by OpenAI, which details the incident in which its models hacked Hugging Face in July. The AI giant’s investigation found that agents used an unauthorized makeshift message board to communicate and plan their actions. This included encouraging each other to hack into what they correctly suspected were real systems and not test environments.
Rogue agents went beyond Hugging Face and hacked other organizations as well. However, OpenAI’s new report also describes unauthorized actions taken within its own network.
Shortly after the Hugging Face incident came to light, OpenAI announced that its models had discovered and exploited a zero-day vulnerability in JFrog’s Artifactory package registration manager.
Additionally, the new report reveals that on July 19, separate from the Hugging Face hack, some agents exploited a known vulnerability in the Linux kernel, CVE-2026-53362, to escalate privileges within an OpenAI environment.
Agents discovered that the Linux kernel version on their underlying computer contained a current, public common vulnerability and exposure (CVE). Agents retrieved the exploit for this CVE (CVE-2026-53362), customized it to succeed on their underlying computer, and used the exploit to escalate privileges. This allowed the agents to operate outside of an Artifactory container and gain root access to the underlying worker node. This allowed the agents to move laterally in the connected environment.
CISA on Thursday added added both the JFrog flaw, tracked as CVE-2026-66384, and the Linux kernel flaw to the Catalog of Known Exploited Vulnerabilities (KEV).
The JFrog product vulnerability was expected to be fixed by federal agencies by September 10th, but CISA recommends that organizations fix CVE-2026-53362 by August 30th.
There appear to be no further reports describing exploitation of the Linux kernel vulnerability in the wild. However, the OpenAI incident shows its potential value to attackers, which may be why CISA has decided to add it to its KEV catalog.
CISA KEV list currently contains more than two dozen Linux kernel vulnerabilities.
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