CVE-2026-31622
Description
A flaw was found in the Linux kernel's NFC (Near Field Communication) digital subsystem. A malicious peer device can exploit this vulnerability by sending specially crafted NFC-A anti-collision cascade responses. This allows the peer to exceed the intended cascade depth, leading to a heap overflow by writing past the allocated buffer for the nfc_target. This memory corruption can result in a denial of service or potentially arbitrary code execution.
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
Frequently Asked Questions
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