Linux Kernel up to 7.2-rc5 nct6775-core nct6775-core.c nct6775_probe out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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3.8$0-$5k0.00-

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5 and classified as problematic. The impacted element is the function nct6775_probe of the file nct6775-core.c of the component nct6775-core. The manipulation results in out-of-bounds. This vulnerability is known as CVE-2026-74553. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 6.6.150/6.12.102/6.18.43/7.1.7/7.2-rc5. Affected is the function nct6775_probe of the file nct6775-core.c of the component nct6775-core. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: hwmon: (nct6775-core) Fix number of temperature registers for NCT6116 Unlike NCT6106, NCT6116 only has three temperature registers, and with it only three temperature source and temperature source configuration registers. The register addresses match those of NCT6106 and can be re-used. The code used a separate array to list the temperature source registers for NCT6116, but used the size of the NCT6106 register array to set the number of registers. The NCT6106 register array provides six addresses, while the temperature source register array for NCT6116 only provides three addresses. This causes a KASAN report. BUG: KASAN: global-out-of-bounds in nct6775_probe+0x936/0x46f0 [nct6775] Read of size 2 at addr ffffffffc19561a6 by task modprobe/954 ... Call Trace: dump_stack+0x7d/0xa7 print_address_description.constprop.0+0x1c/0x220 ? __kasan_kmalloc.constprop.0+0xc9/0xd0 ? __kmalloc_node_track_caller+0x194/0x5b0 ? nct6775_probe+0x936/0x46f0 [nct6775] ? nct6775_probe+0x936/0x46f0 [nct6775] ... Fix the problem by hard-coding the number of temperature and temperature configuration registers to three for NCT6116. Drop the unnecessary NCT6116_REG_TEMP_SOURCE array and re-use NCT6106_REG_TEMP_SOURCE.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-74553 since 08/15/2026. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation requires an enhanced level of successful authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.151, 6.12.103, 6.18.44, 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch 9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef/16c45bb3d3434cfb9ea264fa52090d0823240465/a42d727dae5701deac8bb2a75effadae7d681153/a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0/b0e8adb2ccb43009796897ced09f91636685c9d3 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.0
VulDB Temp Score: 3.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.151/6.12.103/6.18.44/7.1.8/7.2-rc6
Patch: 9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef/16c45bb3d3434cfb9ea264fa52090d0823240465/a42d727dae5701deac8bb2a75effadae7d681153/a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0/b0e8adb2ccb43009796897ced09f91636685c9d3

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74553 (🔒)
GCVE (CVE): GCVE-0-2026-74553
GCVE (VulDB): GCVE-100-390870

Entryinfo

Created: 08/15/2026 15:50
Changes: 08/15/2026 15:50 (60)
Complete: 🔍
Cache ID: 216::103

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