CVE-2026-23390 tracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow

In the Linux kernel, the following vulnerability has been resolved: tracing/dma: Cap dmamapsg tracepoint arrays to prevent buffer overflow The dmamapsg tracepoint can trigger a perf buffer overflow when tracing large scatter-gather lists. With devices like virtio-gpu creating large DRM buffers,...

CVE-2026-23390

CVE-2026-23390 : In the Linux kernel, the tracing/dma subsystem fixes a potential perf buffer overflow in the dma_map_sg tracepoint when handling large scatter-gather lists (e.g., large DRM buffers). The patch caps the three dynamic arrays at 128 entries using min() to prevent excessive allocatio...

PT-2026-27755

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel tracing subsystem contains a flaw in the dma map sg tracepoint. When tracing large scatter-gather lists, the tracepoint can trigger a buffer overflow due to exceeding th...