CVE-2023-52672

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < 162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8affected
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < 3efbd114b91525bb095b8ae046382197d92126b9affected
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < b87a1229d8668fbc78ebd9ca0fc797a76001c60faffected
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < 68e51bdb1194f11d3452525b99c98aff6f837b24affected
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < 6fb70694f8d1ac34e45246b0ac988f025e1e5b55affected
LinuxLinuxc73be61cede5882f9605a852414db559c0ebedfd < e95aada4cb93d42e25c30a0ef9eb2923d9711d4aaffected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.210 <= 5.10.*unaffected
LinuxLinux5.15.149 <= 5.15.*unaffected
LinuxLinux6.1.76 <= 6.1.*unaffected
LinuxLinux6.6.15 <= 6.6.*unaffected
LinuxLinux6.7.3 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References