CVE-2026-74391

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> tracing: Bound synthetic-field strings with seq_buf<br /> <br /> The synthetic field helpers build a prefixed synthetic variable name and<br /> a generated hist command in fixed MAX_FILTER_STR_VAL buffers. The<br /> current code appends those strings with raw strcat(), so long key lists,<br /> field names, or saved filters can run past the end of the staging<br /> buffers.<br /> <br /> Build both strings with seq_buf and propagate -E2BIG if either the<br /> synthetic variable name or the generated command exceeds<br /> MAX_FILTER_STR_VAL. This keeps the existing tracing-side limit while<br /> using the helper intended for bounded command construction.<br /> <br /> [ sdr: Moved struct seq_buf *s for upside-down x-mas tree formatting ]