ghsa-9ccw-6g9x-96r5
Vulnerability from github
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": [],
"aliases": [
"CVE-2025-23138"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-04-16T15:16:08Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatch_queue: fix pipe accounting mismatch\n\nCurrently, watch_queue_set_size() modifies the pipe buffers charged to\nuser-\u003epipe_bufs without updating the pipe-\u003enr_accounted on the pipe\nitself, due to the if (!pipe_has_watch_queue()) test in\npipe_resize_ring(). This means that when the pipe is ultimately freed,\nwe decrement user-\u003epipe_bufs by something other than what than we had\ncharged to it, potentially leading to an underflow. This in turn can\ncause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM.\n\nTo remedy this, explicitly account for the pipe usage in\nwatch_queue_set_size() to match the number set via account_pipe_buffers()\n\n(It\u0027s unclear why watch_queue_set_size() does not update nr_accounted;\nit may be due to intentional overprovisioning in watch_queue_set_size()?)",
"id": "GHSA-9ccw-6g9x-96r5",
"modified": "2025-04-16T15:34:47Z",
"published": "2025-04-16T15:34:46Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23138"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/205028ebba838938d3b264dda1d0708fa7fe1ade"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2d680b988656bb556c863d8b46d9b9096842bf3d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/56ec918e6c86c1536870e4373e91eddd0c44245f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6dafa27764183738dc5368b669b71e3d0d154f12"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8658c75343ed00e5e154ebbe24335f51ba8db547"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d40e3537265dea9e3c33021874437ff26dc18787"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f13abc1e8e1a3b7455511c4e122750127f6bc9b0"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.