CVE-2025-21836

Katalog CVE

CVSS 5.5 · Medium EPSS 0,25%

Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

7 Maret 2025

Terakhir diubah

30 Juli 2026

Status NVD

Modified

CVSS 3.1

5.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

EPSS (30 hari)

0,25% peluang dieksploitasi; lebih tinggi dari 15,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633 patch
• https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 patch
• https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b patch
• https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603 patch
• https://u1f383.github.io/slides/talks/2025_Hexacon-Deja_Vu_in_Linux_io_uring_Breaking_Memory_Sharing_Again_Aft...