# CVE-2026-90197: HID: haptic: don't write an uninitialized value to unhandled usages

CVE-2026-90197 is fixed in linux on 1 platform by DEBIAN-CVE-2026-90197 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90197
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0021
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90197

## Description

In the Linux kernel, the following vulnerability has been resolved:  HID: haptic: don't write an uninitialized value to unhandled usages  fill_effect_buf() initializes value only for the four haptic usages handled by its switch, but writes it to field->value[] for every usage. An unhandled usage can therefore receive either an uninitialized value or one left over from the previous usage. hid_output_report() then serializes that value into the effect's report buffer.  Skip unhandled usages instead. This also matches switch_mode(), which only updates fields it recognizes.  Found with Clang's -Wconditional-uninitialized.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-90197](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90197.md) | Sep 23, 2026 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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