{"id":"CVE-2025-23138","title":"watch_queue: fix pipe accounting mismatch","summary":"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->pipe_bufs without updating the pipe->nr_accounte…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8 < 8658c75343ed00e5e154ebbe24335f51ba8db547","Linux >= 3efbd114b91525bb095b8ae046382197d92126b9 < 471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284","Linux >= b87a1229d8668fbc78ebd9ca0fc797a76001c60f < d40e3537265dea9e3c33021874437ff26dc18787","Linux >= 68e51bdb1194f11d3452525b99c98aff6f837b24 < 6dafa27764183738dc5368b669b71e3d0d154f12","Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 56ec918e6c86c1536870e4373e91eddd0c44245f","Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 2d680b988656bb556c863d8b46d9b9096842bf3d","Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 205028ebba838938d3b264dda1d0708fa7fe1ade","Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < f13abc1e8e1a3b7455511c4e122750127f6bc9b0","Linux 6fb70694f8d1ac34e45246b0ac988f025e1e5b55","Linux >= 5.10.210 < 5.10.236","Linux >= 5.15.149 < 5.15.180","Linux >= 6.1.76 < 6.1.134","Linux >= 6.6.15 < 6.6.87","Linux >= 6.7.3 < 6.8","Linux 6.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:39:21.626419Z"},"published":"2025-04-16","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:41:51.576Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-23138","references":[{"url":"https://git.kernel.org/stable/c/8658c75343ed00e5e154ebbe24335f51ba8db547"},{"url":"https://git.kernel.org/stable/c/471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284"},{"url":"https://git.kernel.org/stable/c/d40e3537265dea9e3c33021874437ff26dc18787"},{"url":"https://git.kernel.org/stable/c/6dafa27764183738dc5368b669b71e3d0d154f12"},{"url":"https://git.kernel.org/stable/c/56ec918e6c86c1536870e4373e91eddd0c44245f"},{"url":"https://git.kernel.org/stable/c/2d680b988656bb556c863d8b46d9b9096842bf3d"},{"url":"https://git.kernel.org/stable/c/205028ebba838938d3b264dda1d0708fa7fe1ade"},{"url":"https://git.kernel.org/stable/c/f13abc1e8e1a3b7455511c4e122750127f6bc9b0"}],"tags":["cve.org"],"epss":0.0021,"epssPercentile":0.11314,"ingestedAt":"2026-11-05T22:38:31.862Z","slug":"CVE-2025-23138","body":"## Overview\n\nIn 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->pipe_bufs without updating the pipe->nr_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->pipe_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's unclear why watch_queue_set_size() does not update nr_accounted;\nit may be due to intentional overprovisioning in watch_queue_set_size()?)\n\n## Affected\n\n- `Linux >= 162ae0e78bdabf84ef10c1293c4ed7865cb7d3c8 < 8658c75343ed00e5e154ebbe24335f51ba8db547`\n- `Linux >= 3efbd114b91525bb095b8ae046382197d92126b9 < 471c89b7d4f58bd6082f7c1fe14d4ca15c7f1284`\n- `Linux >= b87a1229d8668fbc78ebd9ca0fc797a76001c60f < d40e3537265dea9e3c33021874437ff26dc18787`\n- `Linux >= 68e51bdb1194f11d3452525b99c98aff6f837b24 < 6dafa27764183738dc5368b669b71e3d0d154f12`\n- `Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 56ec918e6c86c1536870e4373e91eddd0c44245f`\n- `Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 2d680b988656bb556c863d8b46d9b9096842bf3d`\n- `Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < 205028ebba838938d3b264dda1d0708fa7fe1ade`\n- `Linux >= e95aada4cb93d42e25c30a0ef9eb2923d9711d4a < f13abc1e8e1a3b7455511c4e122750127f6bc9b0`\n- `Linux 6fb70694f8d1ac34e45246b0ac988f025e1e5b55`\n- `Linux >= 5.10.210 < 5.10.236`\n- `Linux >= 5.15.149 < 5.15.180`\n- `Linux >= 6.1.76 < 6.1.134`\n- `Linux >= 6.6.15 < 6.6.87`\n- `Linux >= 6.7.3 < 6.8`\n- `Linux 6.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}