CVE-2026-23390
Description
A flaw was found in the Linux kernel. When tracing large scatter-gather lists, which are mechanisms for efficient data transfer, the dma_map_sg tracepoint can trigger a performance buffer overflow. This can lead to the tracing buffer becoming too small, potentially causing system warnings and affecting the stability of the tracing functionality.
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands; Read Memory; Modify Memory
If the incorrect calculation is used in the context of memory allocation, then the software may create a buffer that is smaller or larger than expected. If the allocated buffer is smaller than expected, this could lead to an out-of-bounds read or write (CWE-119), possibly causing a crash, allowing arbitrary code execution, or exposing sensitive data.
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