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medium5.5

CVE-2023-52672

In the Linux kernel, the following vulnerability has been resolved: pipe: wakeup wr_wait after setting max_usage Commit c73be61cede5 ("pipe: Add general notifi…

Impact

In the Linux kernel, the following vulnerability has been resolved: pipe: wakeup wr_wait after setting max_usage Commit c73be61cede5 ("pipe: Add general notification queue support") a regression was introduced that would lock up resized pipes under certain conditions. See the reproducer in [1]. The commit resizing the pipe ring size was moved to a different function, doing that moved the wakeup for pipe->wr_wait before actually raising pipe->max_usage. If a pipe was full before the resize occured it would result in the wakeup never actually triggering pipe_write. Set @max_usage and @nr_accounted before waking writers if this isn't a watch queue. [Christian Brauner <brauner@kernel.org>: rewrite to account for watch queues]

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 5.8 before 5.10.210
from 5.11 before 5.15.149
from 5.16 before 6.1.76
from 6.2 before 6.6.15
from 6.7 before 6.7.3
DebianDebian Linux
Version 10.0

Weakness classification

CWE-400

References