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CVE-2026-74546— hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxfc958a61ff6d34a0ec42744d3ff524ee202b2e9f< d328175045176f85c15c369bd21dc551351e7935affected
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f< 832069bec79cf6f903441c5769d3cdba95d0af33affected
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f< 96ad57d31763559d376416cdf3bf5ae79bbbebecaffected
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f< 76963b04b2d1c648d69949d8dd521e1ff7f40b51affected
fc958a61ff6d34a0ec42744d3ff524ee202b2e9f< 1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3affected
5.15affected
< 5.15unaffected
6.6.151≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-74546

Vulnerability Information
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Vulnerability Title
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.
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存在安全漏洞，该漏洞源于读取风扇数据时的TOCTOU竞争条件，可能导致除以零崩溃。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux fc958a61ff6d34a0ec42744d3ff524ee202b2e9f ~ d328175045176f85c15c369bd21dc551351e7935 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2026-74546

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III. Intelligence Information for CVE-2026-74546

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Patches & Fixes for CVE-2026-74546 (4)

Same Patch Batch · Linux · 2026-08-15 · 846 CVEs total

CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-7242110.0 CRITICALipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7428010.0 CRITICALcrypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7240710.0 CRITICALgeneve: validate inner network offset in geneve_gro_complete()
CVE-2026-724939.9 CRITICALnet: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-744339.8 CRITICALrxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-722089.8 CRITICALntfs: add bounds check before accessing EA entries
CVE-2026-720659.8 CRITICALnet: mana: Validate the packet length reported by the NIC
CVE-2026-720649.8 CRITICALnet: mana: Sync page pool RX frags for CPU
CVE-2026-724299.8 CRITICALipv6: ioam: fix type confusion of dst_entry
CVE-2026-723179.8 CRITICALSUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-744279.8 CRITICALafs: Fix netns teardown to cancel the preallocation charger
CVE-2026-721379.8 CRITICALxfrm: nat_keepalive: avoid double free on send error
CVE-2026-724369.8 CRITICALnetfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
CVE-2026-744289.8 CRITICALrxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-724519.8 CRITICALxfrm: Fix xfrm state cache insertion race
CVE-2026-720469.8 CRITICALgve: fix header buffer corruption with header-split and HW-GRO

Showing top 20 of 846 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74546

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