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CVE-2026-93129: platform/x86: dell-wmi-base: Fix handling of ultra performance key

• 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 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: dell-wmi-base: Fix handling of ultra performance key The commit message of commit 5fbd827eb9c2 ("platform/x86: dell-wmi: Recognise or support new switches") states that the ultra performance key contains additional data after the type and code fields. The event data passed to dell_wmi_process_key() is already parsed, so "buffer" already starts after those two fields. Use the correct index for accessing the first data field to avoid a potential buffer overread.

Affected products

• Linux: 5.16 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/16a82add1918d3aae1e0b68c0a983b6fc64f5062
• https://git.kernel.org/stable/c/30674a7bbf20311a0c4edd5edb9526ef1eecc692
• https://git.kernel.org/stable/c/392c19faec6bf4cb72fb02322e2a61e198dd8f72
• https://git.kernel.org/stable/c/ace1a687ea9ea70d17e3089ca173acfa1ec24412
• https://git.kernel.org/stable/c/adfd6846bea13667ff28f8aaf00c32fbd69825ab
• https://git.kernel.org/stable/c/ef16f467393ca1a15ec8431fba5e67dd6071074e

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