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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
LinuxCNA
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 9%
VendorProductVersion
linuxlinux_kernel
5.19 ≤
𝑥
< 6.6.79
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.16
linuxlinux_kernel
6.13 ≤
𝑥
< 6.13.4
linuxlinux_kernel
6.14:rc1
linuxlinux_kernel
6.14:rc2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
5.10.223-1
not-affected
bullseye (security)
5.10.244-1
fixed
bookworm
vulnerable
bookworm (security)
vulnerable
trixie
6.12.57-1
fixed
trixie (security)
6.12.48-1
fixed
forky
6.17.9-1
fixed
sid
6.17.10-1
fixed