CVE-2026-74553 is a vulnerability in Linux Kernel
Published on August 15, 2026
hwmon: (nct6775-core) Fix number of temperature registers for NCT6116
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.
Products Associated with CVE-2026-74553
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Affected Versions
Linux:- Version 29c7cb485b321c024dedc168bcbb04451176b163 and below 9a87dfaa05c3c9d3a4cdb7eafc1ab4abc84f6eef is affected.
- Version 29c7cb485b321c024dedc168bcbb04451176b163 and below 16c45bb3d3434cfb9ea264fa52090d0823240465 is affected.
- Version 29c7cb485b321c024dedc168bcbb04451176b163 and below a42d727dae5701deac8bb2a75effadae7d681153 is affected.
- Version 29c7cb485b321c024dedc168bcbb04451176b163 and below a7f47f5246cd6c3199e5fb2d4109cc53e766e3f0 is affected.
- Version 29c7cb485b321c024dedc168bcbb04451176b163 and below b0e8adb2ccb43009796897ced09f91636685c9d3 is affected.
- Version 5.4 is affected.
- Before 5.4 is unaffected.
- Version 6.6.151, <= 6.6.* is unaffected.
- Version 6.12.103, <= 6.12.* is unaffected.
- Version 6.18.44, <= 6.18.* is unaffected.
- Version 7.1.8, <= 7.1.* is unaffected.
- Version 7.2-rc6, <= * is unaffected.