https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-02T16:36:23.560353+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2025-21836 CVE-2025-21836 — io_uring/kbuf: reallocate buf lists on upgrade 2026-10-02T16:36:23.562412+00:00

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

io_uring/kbuf: reallocate buf lists on upgrade

IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.