# CVE-2026-23323: linux: In the Linux kernel, the following vulnerability has been resolved:  hwmon: (macsmc) Fix regressions in Apple Silicon...

CVE-2026-23323 is fixed in linux on 1 platform by DEBIAN-CVE-2026-23323 (version 6.19.8-1), released March 25, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-23323
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 25, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.19.8-1 | [DEBIAN-CVE-2026-23323](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23323.md) | Mar 25, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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