What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.18 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d92c250815cba6bffd64f0125fac7afe4fa6ce0
• https://git.kernel.org/stable/c/324cc98b71f0d3dee7367ef3c669fd80747e71b6
• https://git.kernel.org/stable/c/3efb7f6491526f5012f9ec94769e9ed832feeef8

Get alerted when CVE-2026-90197 or the next vulnerability affects your stack