CVE-2026-23323
published 2026-03-25CVE-2026-23323: In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently added…
PriorityP340high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.13%
3.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently added macsmc-hwmon driver contained several critical
bugs in its sensor population logic and float conversion routines.
Specifically:
- The voltage sensor population loop used the wrong prefix ("volt-"
instead of "voltage-") and incorrectly assigned sensors to the
temperature sensor array (hwmon->temp.sensors) instead of the
voltage sensor array (hwmon->volt.sensors). This would lead to
out-of-bounds memory access or data corruption when both temperature
and voltage sensors were present.
- The float conversion in macsmc_hwmon_write_f32() had flawed exponent
logic for values >= 2^24 and lacked masking for the mantissa, which
could lead to incorrect values being written to the SMC.
Fix these issues to ensure correct sensor registration and reliable
manual fan control.
Confirm that the reported overflow in FIELD_PREP is fixed by declaring
macsmc_hwmon_write_f32() as __always_inline for a compile test.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.19.8-1 (forky) | linux 6.19.8-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= 785205fd81399bd8e49065aee3362a99d5702321 < 625ef35b70d3883fb9a41cd5a988e64dd3e447d6 | 625ef35b70d3883fb9a41cd5a988e64dd3e447d6 |
| linux | linux | >= 785205fd81399bd8e49065aee3362a99d5702321 < 5dd69b864911ae3847365e8bafe7854e79fbeecb | 5dd69b864911ae3847365e8bafe7854e79fbeecb |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.19.8-1 | 6.19.8-1 |
| linux | linux_kernel | >= 6.19.0 < 6.19.7 | 6.19.7 |
| linux | linux_kernel | >= 6.19.1 < 6.19.7 | 6.19.7 |
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VulDB
Linux Kernel up to 6.19.6/7.0-rc2 hwmon macsmc_hwmon_write_f32 out-of-bounds (Nessus ID 304120 / WID-SEC-2026-0861)
vuldb·2026-06-17·CVSS 7.8
CVE-2026-23323 [HIGH] Linux Kernel up to 6.19.6/7.0-rc2 hwmon macsmc_hwmon_write_f32 out-of-bounds (Nessus ID 304120 / WID-SEC-2026-0861)
A vulnerability identified as critical has been detected in Linux Kernel up to 6.19.6/7.0-rc2. This issue affects the function macsmc_hwmon_write_f32 of the component hwmon. This manipulation causes out-of-bounds read.
This vulnerability is registered as CVE-2026-23323. The attack requires access to the local network. No exploit is available.
You should upgrade the affected component.
OSV
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
osv·2026-03-25
CVE-2026-23323 hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently added macsmc-hwmon driver contained several critical
bugs in its sensor population logic and float conversion routines.
Specifically:
- The voltage sensor population loop used the wrong prefix ("volt-"
instead of "voltage-") and incorrectly assigned sensors to the
temperature sensor array (hwmon->temp.sensors) instead of the
voltage sensor array (hwmon->volt.sensors). This would lead to
out-of-bounds memory access or data corruption when both temperature
and voltage sensors were present.
- The float conversion in macsmc_hwmon_write_f32() had flawed exponent
logic for values >=
GHSA
GHSA-xf4v-3mcr-w96x: In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently a
ghsa_unreviewed·2026-03-25
CVE-2026-23323 GHSA-xf4v-3mcr-w96x: In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently a
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently added macsmc-hwmon driver contained several critical
bugs in its sensor population logic and float conversion routines.
Specifically:
- The voltage sensor population loop used the wrong prefix ("volt-"
instead of "voltage-") and incorrectly assigned sensors to the
temperature sensor array (hwmon->temp.sensors) instead of the
voltage sensor array (hwmon->volt.sensors). This would lead to
out-of-bounds memory access or data corruption when both temperature
and voltage sensors were present.
- The float conversion in macsmc_hwmon_write_f32() had flawed exponent
logic for values >= 2^24 and lacked masking for the mantissa, which
could lead to inco
OSV
CVE-2026-23323: In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently add
osv·2026-03-25
CVE-2026-23323 CVE-2026-23323: In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently add
In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently added macsmc-hwmon driver contained several critical bugs in its sensor population logic and float conversion routines. Specifically: - The voltage sensor population loop used the wrong prefix ("volt-" instead of "voltage-") and incorrectly assigned sensors to the temperature sensor array (hwmon->temp.sensors) instead of the voltage sensor array (hwmon->volt.sensors). This would lead to out-of-bounds memory access or data corruption when both temperature and voltage sensors were present. - The float conversion in macsmc_hwmon_write_f32() had flawed exponent logic for values >= 2^24 and lacked masking for the mantissa, which could lead to incorre
Red Hat
kernel: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
vendor_redhat·2026-03-25
CVE-2026-23323 CWE-787 kernel: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
kernel: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
In the Linux kernel, the following vulnerability has been resolved:
hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver
The recently added macsmc-hwmon driver contained several critical
bugs in its sensor population logic and float conversion routines.
Specifically:
- The voltage sensor population loop used the wrong prefix ("volt-"
instead of "voltage-") and incorrectly assigned sensors to the
temperature sensor array (hwmon->temp.sensors) instead of the
voltage sensor array (hwmon->volt.sensors). This would lead to
out-of-bounds memory access or data corruption when both temperature
and voltage sensors were present.
- The float conversion in macsmc_hwmon_write_f32() had flawed exponent
logic for valu
Debian
CVE-2026-23323: linux - In the Linux kernel, the following vulnerability has been resolved: hwmon: (mac...
vendor_debian·2026
CVE-2026-23323 [LOW] CVE-2026-23323: linux - In the Linux kernel, the following vulnerability has been resolved: hwmon: (mac...
In the Linux kernel, the following vulnerability has been resolved: hwmon: (macsmc) Fix regressions in Apple Silicon SMC hwmon driver The recently added macsmc-hwmon driver contained several critical bugs in its sensor population logic and float conversion routines. Specifically: - The voltage sensor population loop used the wrong prefix ("volt-" instead of "voltage-") and incorrectly assigned sensors to the temperature sensor array (hwmon->temp.sensors) instead of the voltage sensor array (hwmon->volt.sensors). This would lead to out-of-bounds memory access or data corruption when both temperature and voltage sensors were present. - The float conversion in macsmc_hwmon_write_f32() had flawed exponent logic for values >= 2^24 and lacked masking for the mantissa, which could lead to incorre
No detection rules found.
No public exploits indexed.
2026-03-25
Published