Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-74547— hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread

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 2.6.29版本存在安全漏洞，该漏洞源于adt7470驱动对auto_update_interval参数值的下限设置不当，导致用户空间将该参数配置为0时，更新线程陷入无界忙循环，持续占用CPU并向I2C总线发送大量事务，可能导致拒绝服务。

AI Predicted 6.5 Difficulty: Easy EPSS 0.18% · P8

Possible ATT&CK Techniques 2 AI

T1562 T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 89fac11cb3e7c5860c425dba14845c09ccede39d< 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344 affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 4dc1518f9cc57c6db99514cafeb02dd7117d5bda affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 1325975a2eab265510e6036d8bf0c0068373d332 affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 1a42bd72a66205e439db1d1142442b62d393408a affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 38e6b5ce5794ff09442231cc171c2be5e900bab3 affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 82d65f7ef11edcea0228745440b8b4b1f222c34c affected
89fac11cb3e7c5860c425dba14845c09ccede39d< 5ea299c3aa42a827f6a863eeead6de3525bbb17a affected
89fac11cb3e7c5860c425dba14845c09ccede39d< cb0b7f9c43b0abbd422a7e4c2c85e91db429207c affected
… +10 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-74547

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread When userspace configures 'auto_update_interval' to 0 via sysfs, the background kthread executes schedule_timeout_interruptible(0), which returns immediately. If 'num_temp_sensors' is concurrently or previously set to 0, the msleep_interruptible() delay inside adt7470_read_temperatures() also becomes 0. This combination forces the background thread into a tight, unbounded busy-loop, hogging the CPU and flooding the I2C bus with a continuous stream of transactions. Fix this vulnerability by raising the lower limit of the clamp_val in auto_update_interval_store() from 0 to 500 milliseconds. This guarantees a reasonable minimum sleep window between sensor updates, protecting the system from intentional or accidental I2C bus denial of service.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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 2.6.29版本存在安全漏洞，该漏洞源于adt7470驱动对auto_update_interval参数值的下限设置不当，导致用户空间将该参数配置为0时，更新线程陷入无界忙循环，持续占用CPU并向I2C总线发送大量事务，可能导致拒绝服务。
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 89fac11cb3e7c5860c425dba14845c09ccede39d ~ 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344 -
Linux Linux 2.6.29 -

II. Public POCs for CVE-2026-74547

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-74547

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-74547 (7)

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-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
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-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72069 9.8 CRITICAL locking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
CVE-2026-72065 9.8 CRITICAL net: mana: Validate the packet length reported by the NIC
CVE-2026-72064 9.8 CRITICAL net: mana: Sync page pool RX frags for CPU
CVE-2026-72137 9.8 CRITICAL xfrm: nat_keepalive: avoid double free on send error
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72139 9.8 CRITICAL tcp: defer md5sig_info kfree past RCU grace period in tcp_connect
CVE-2026-74376 9.8 CRITICAL md/raid10: reset read_slot when reusing r10bio for discard
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-72494 9.8 CRITICAL RDMA/irdma: Replace waitqueue and flag with completion
CVE-2026-72226 9.8 CRITICAL batman-adv: tt: prevent TVLV OOB check overflow
CVE-2026-72355 9.8 CRITICAL netfs: Fix barriering when walking subrequest list

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74547

No comments yet

Leave a comment