CVE-2026-72066

cpu: hotplug: Bound hotplug states sysfs output

State: Published
Severity: 7.8 High
Published: Aug 15, 2026
Updated: Oct 19, 2026
Reserved: Aug 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
LinuxLinux	98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 27481cf4365a6ff5c9be3590143e7ed434000266Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 2408be459c70ef4250da1a9e50f5478e6b250d61Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 998f66e9ce320f3433f60b948e3698b744754a46Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 61a73a123ac7a7fbc57382531f8cb7092d569abaAffected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 6cb15b81ff545840048fb0e1a6e827d560dbf367Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 631d53102da9f469c96b882b770336bec095b833Affected 98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 86f436567f2516a0083b210bedc933544826a2c3Affected
LinuxLinux	4.6Affected before 4.6Not affected 5.10.265 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 27481cf4365a6ff5c9be3590143e7ed434000266Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 2408be459c70ef4250da1a9e50f5478e6b250d61Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 998f66e9ce320f3433f60b948e3698b744754a46Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 61a73a123ac7a7fbc57382531f8cb7092d569abaAffected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 6cb15b81ff545840048fb0e1a6e827d560dbf367Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 631d53102da9f469c96b882b770336bec095b833Affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e to before 86f436567f2516a0083b210bedc933544826a2c3Affected

LinuxLinux

4.6Affected
before 4.6Not affected
5.10.265 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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