CVE-2025-23138

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8 < 8658c75343ed00e5e154ebbe24335f51ba8db547affected
LinuxLinux3efbd114b91525bb095b8ae046382197d92126b9 < 471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284affected
LinuxLinuxb87a1229d8668fbc78ebd9ca0fc797a76001c60f < d40e3537265dea9e3c33021874437ff26dc18787affected
LinuxLinux68e51bdb1194f11d3452525b99c98aff6f837b24 < 6dafa27764183738dc5368b669b71e3d0d154f12affected
LinuxLinuxe95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 56ec918e6c86c1536870e4373e91eddd0c44245faffected
LinuxLinuxe95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 2d680b988656bb556c863d8b46d9b9096842bf3daffected
LinuxLinuxe95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 205028ebba838938d3b264dda1d0708fa7fe1adeaffected
LinuxLinuxe95aada4cb93d42e25c30a0ef9eb2923d9711d4a < f13abc1e8e1a3b7455511c4e122750127f6bc9b0affected
LinuxLinux6fb70694f8d1ac34e45246b0ac988f025e1e5b55affected
LinuxLinux5.10.210 < 5.10.236affected
LinuxLinux5.15.149 < 5.15.180affected
LinuxLinux6.1.76 < 6.1.134affected
LinuxLinux6.6.15 < 6.6.87affected
LinuxLinux6.7.3 < 6.8affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux5.10.236 <= 5.10.*unaffected
LinuxLinux5.15.180 <= 5.15.*unaffected
LinuxLinux6.1.134 <= 6.1.*unaffected
LinuxLinux6.6.87 <= 6.6.*unaffected
LinuxLinux6.12.23 <= 6.12.*unaffected
LinuxLinux6.13.11 <= 6.13.*unaffected
LinuxLinux6.14.2 <= 6.14.*unaffected
LinuxLinux6.15 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

References