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.
References8
- git.kernel.org/stable/c/2408be459c70ef4250da1a9e50f5478e6b250d61
- git.kernel.org/stable/c/27481cf4365a6ff5c9be3590143e7ed434000266
- git.kernel.org/stable/c/61a73a123ac7a7fbc57382531f8cb7092d569aba
- git.kernel.org/stable/c/631d53102da9f469c96b882b770336bec095b833
- git.kernel.org/stable/c/6cb15b81ff545840048fb0e1a6e827d560dbf367
- git.kernel.org/stable/c/86f436567f2516a0083b210bedc933544826a2c3
- git.kernel.org/stable/c/998f66e9ce320f3433f60b948e3698b744754a46
- git.kernel.org/stable/c/de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 7 · as of 11 November 2026
- CWE
- CWE-120
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.