Vulnerability Database

299,038

Total vulnerabilities in the database

CVE-2025-21836

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.

  • Published: Mar 7, 2025
  • Updated: Nov 4, 2025
  • CVE: CVE-2025-21836
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.5
  • AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

No CWE or OWASP classifications available.

Software From Fixed in
linux / linux_kernel 5.19 6.6.79
linux / linux_kernel 6.7 6.12.16
linux / linux_kernel 6.13 6.13.4
linux / linux_kernel 6.14-rc1 6.14-rc1.x
linux / linux_kernel 6.14-rc2 6.14-rc2.x