What’s Vulnerable › Vulnerabilities

CVE-2026-72066: cpu: hotplug: Bound hotplug states sysfs output

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-19
• Weakness: CWE-120

Description

In the Linux kernel, the following vulnerability has been resolved: cpu: hotplug: Bound hotplug states sysfs output states_show() adds CPU hotplug state names into a single sysfs buffer using sprintf(). With enough registered states, this can write past the end of the PAGE_SIZE buffer. Use sysfs_emit_at() so output is bounded.

Affected products

• Linux kernel: 4.6 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2408be459c70ef4250da1a9e50f5478e6b250d61
• https://git.kernel.org/stable/c/27481cf4365a6ff5c9be3590143e7ed434000266
• https://git.kernel.org/stable/c/61a73a123ac7a7fbc57382531f8cb7092d569aba
• https://git.kernel.org/stable/c/631d53102da9f469c96b882b770336bec095b833
• https://git.kernel.org/stable/c/6cb15b81ff545840048fb0e1a6e827d560dbf367
• https://git.kernel.org/stable/c/86f436567f2516a0083b210bedc933544826a2c3
• https://git.kernel.org/stable/c/998f66e9ce320f3433f60b948e3698b744754a46
• https://git.kernel.org/stable/c/de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635

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