SB20260816459 - Stack-based buffer overflow in Linux kernel states_show() in kernel/cpu.c
Published: August 16, 2026
Security Bulletin ID
SB20260816459
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Stack-based buffer overflow (CVE-ID: CVE-2026-72066)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a stack-based buffer overflow in states_show() in kernel/cpu.c when generating sysfs output for CPU hotplug states. A local user can read the affected sysfs entry to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2408be459c70ef4250da1a9e50f5478e6b250d61
- 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