7.8
HIGH
CVSS 3.1
CVE-2026-72066
cpu: hotplug: Bound hotplug states sysfs output
Overview
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.
Details
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
Fix buffer overflow in sysfs output by using sysfs_emit_at.
- Update the Linux kernel.
- Apply the provided patch.
- Use sysfs_emit_at for bounded output.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72066.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72066 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72066
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72066 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72066 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '2408be459c70ef4250da1a9e50f5478e6b250d61', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': 'de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '998f66e9ce320f3433f60b948e3698b744754a46', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '61a73a123ac7a7fbc57382531f8cb7092d569aba', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '6cb15b81ff545840048fb0e1a6e827d560dbf367', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '631d53102da9f469c96b882b770336bec095b833', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '86f436567f2516a0083b210bedc933544826a2c3', 'versionType': 'git'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '2408be459c70ef4250da1a9e50f5478e6b250d61', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': 'de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '998f66e9ce320f3433f60b948e3698b744754a46', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '61a73a123ac7a7fbc57382531f8cb7092d569aba', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '6cb15b81ff545840048fb0e1a6e827d560dbf367', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '631d53102da9f469c96b882b770336bec095b833', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '86f436567f2516a0083b210bedc933544826a2c3', 'versionType': 'git'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '2408be459c70ef4250da1a9e50f5478e6b250d61', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': 'de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '998f66e9ce320f3433f60b948e3698b744754a46', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '61a73a123ac7a7fbc57382531f8cb7092d569aba', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '6cb15b81ff545840048fb0e1a6e827d560dbf367', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '631d53102da9f469c96b882b770336bec095b833', 'versionType': 'git'}, {'status': 'affected', 'version': '98f8cdce1db580b99fce823a48eea2cb2bdb261e', 'lessThan': '86f436567f2516a0083b210bedc933544826a2c3', 'versionType': 'git'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.6'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.6', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['kernel/cpu.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/2408be459c70ef4250da1a9e50f5478e6b250d61 Added Reference https://git.kernel.org/stable/c/61a73a123ac7a7fbc57382531f8cb7092d569aba Added Reference https://git.kernel.org/stable/c/631d53102da9f469c96b882b770336bec095b833 Added Reference https://git.kernel.org/stable/c/6cb15b81ff545840048fb0e1a6e827d560dbf367 Added Reference https://git.kernel.org/stable/c/86f436567f2516a0083b210bedc933544826a2c3 Added Reference https://git.kernel.org/stable/c/998f66e9ce320f3433f60b948e3698b744754a46 Added Reference https://git.kernel.org/stable/c/de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.