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CVE PROGRAM SOURCE RECORDUnscored

CVE-2025-23138

watch_queue: fix pipe accounting mismatch

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: watch_queue: fix pipe accounting mismatch Currently, watch_queue_set_size() modifies the pipe buffers charged to user->pipe_bufs without updating the pipe->nr_accounted on the pipe itself, due to the if (!pipe_has_watch_queue()) test in pipe_resize_ring(). This means that when the pipe is ultimately freed, we decrement user->pipe_bufs by something other than what than we had charged to it, potentially leading to an underflow. This in turn can cause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM. To remedy this, explicitly account for the pipe usage in watch_queue_set_size() to match the number set via account_pipe_buffers() (It's unclear why watch_queue_set_size() does not update nr_accounted; it may be due to intentional overprovisioning in watch_queue_set_size()?)

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8 to < 8658c75343ed00e5e154ebbe24335f51ba8db547affected
  • 3efbd114b91525bb095b8ae046382197d92126b9 to < 471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284affected
  • b87a1229d8668fbc78ebd9ca0fc797a76001c60f to < d40e3537265dea9e3c33021874437ff26dc18787affected
  • 68e51bdb1194f11d3452525b99c98aff6f837b24 to < 6dafa27764183738dc5368b669b71e3d0d154f12affected
  • e95aada4cb93d42e25c30a0ef9eb2923d9711d4a to < 56ec918e6c86c1536870e4373e91eddd0c44245faffected
  • e95aada4cb93d42e25c30a0ef9eb2923d9711d4a to < 2d680b988656bb556c863d8b46d9b9096842bf3daffected
  • e95aada4cb93d42e25c30a0ef9eb2923d9711d4a to < 205028ebba838938d3b264dda1d0708fa7fe1adeaffected
  • e95aada4cb93d42e25c30a0ef9eb2923d9711d4a to < f13abc1e8e1a3b7455511c4e122750127f6bc9b0affected
  • 6fb70694f8d1ac34e45246b0ac988f025e1e5b55affected
  • 5.10.210 to < 5.10.236affected
  • 5.15.149 to < 5.15.180affected
  • 6.1.76 to < 6.1.134affected
  • 6.6.15 to < 6.6.87affected
  • 6.7.3 to < 6.8affected

Linux Linux

Default version status: affected

  • 6.8affected
  • 0 to < 6.8unaffected
  • 5.10.236 to ≤ 5.10.*unaffected
  • 5.15.180 to ≤ 5.15.*unaffected
  • 6.1.134 to ≤ 6.1.*unaffected
  • 6.6.87 to ≤ 6.6.*unaffected
  • 6.12.23 to ≤ 6.12.*unaffected
  • 6.13.11 to ≤ 6.13.*unaffected
  • 6.14.2 to ≤ 6.14.*unaffected
  • 6.15 to ≤ *unaffected

References