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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 4.6版本存在安全漏洞，该漏洞源于states_show()函数使用sprintf()将CPU热插拔状态名称写入单个sysfs缓冲区，可能导致写入超出PAGE_SIZE缓冲区边界。

CVSS 7.8 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 98f8cdce1db580b99fce823a48eea2cb2bdb261e< 27481cf4365a6ff5c9be3590143e7ed434000266 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 2408be459c70ef4250da1a9e50f5478e6b250d61 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 998f66e9ce320f3433f60b948e3698b744754a46 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 61a73a123ac7a7fbc57382531f8cb7092d569aba affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 6cb15b81ff545840048fb0e1a6e827d560dbf367 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 631d53102da9f469c96b882b770336bec095b833 affected
98f8cdce1db580b99fce823a48eea2cb2bdb261e< 86f436567f2516a0083b210bedc933544826a2c3 affected
… +10 more rows
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I. Basic Information for CVE-2026-72066

Vulnerability Information
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Vulnerability Title
cpu: hotplug: Bound hotplug states sysfs output
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 4.6版本存在安全漏洞，该漏洞源于states_show()函数使用sprintf()将CPU热插拔状态名称写入单个sysfs缓冲区，可能导致写入超出PAGE_SIZE缓冲区边界。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 98f8cdce1db580b99fce823a48eea2cb2bdb261e ~ 27481cf4365a6ff5c9be3590143e7ed434000266 -
Linux Linux 4.6 -

II. Public POCs for CVE-2026-72066

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III. Intelligence Information for CVE-2026-72066

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Patches & Fixes for CVE-2026-72066 (8)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-74545 9.8 CRITICAL rtase: fix double free of multi-frag skb on DMA map failure
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work
CVE-2026-72429 9.8 CRITICAL ipv6: ioam: fix type confusion of dst_entry
CVE-2026-72129 9.8 CRITICAL nvmet-rdma: handle inline data with a nonzero offset
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72436 9.8 CRITICAL netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
CVE-2026-72206 9.8 CRITICAL ntfs: validate index block header more strictly
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-74427 9.8 CRITICAL afs: Fix netns teardown to cancel the preallocation charger
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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