Public bug reported:
[Impact]
io_uring has been an important attack vector in the recent years in local
privilege escalation attacks. Allowing admins that don't use io_uring to
disable it in their systems allows them to reduce their attack surface.
[Test case]
sysctl -w kernel.io_uring_disabled=1
then try to use io_uring from an unprivileged user, then try it with privileges
(CAP_SYS_ADMIN)
[Potential regression]
Uses can be denied from using io_uring.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2035116
Title:
allow io_uring to be disabled in runtime
Status in linux package in Ubuntu:
New
Status in linux source package in Focal:
New
Status in linux source package in Jammy:
New
Status in linux source package in Lunar:
New
Status in linux source package in Mantic:
New
Bug description:
[Impact]
io_uring has been an important attack vector in the recent years in local
privilege escalation attacks. Allowing admins that don't use io_uring to
disable it in their systems allows them to reduce their attack surface.
[Test case]
sysctl -w kernel.io_uring_disabled=1
then try to use io_uring from an unprivileged user, then try it with
privileges (CAP_SYS_ADMIN)
[Potential regression]
Uses can be denied from using io_uring.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2035116/+subscriptions
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