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CVE-2023-52672

Disclosure Date: May 17, 2024 •
CVE-2023-52672
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Description

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]

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CVSS V3 Severity and Metrics
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General Information

Offensive Application
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OS
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Vulnerable Versions
Linux 162ae0e78bda
Linux not down converted
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Vendors

  • Linux

Products

  • Linux
Technical Analysis