{"id":"CVE-2026-31480","title":"tracing: Fix potential deadlock in cpu hotplug with osnoise","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix potential deadlock in cpu hotplug with osnoise\n\nThe following sequence may leads deadlock in cpu hotplug:\n\n    task1        task2        task3\n    -----   …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < cf929c21eeed5bd39873fb14bfdfff963fa6f1da","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 7aa095ce7d224308cb6979956f0de8607df93d4f","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < ef41a85a55022e27cdaebf22a6676910b66f65aa","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 03474a01c199de17a8e2d39b51df6beb9c76e831","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f","Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 1f9885732248d22f788e4992c739a98c88ab8a55","Linux 5.14"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:34:34.600654Z"},"published":"2026-04-22","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:45:00.955Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31480","references":[{"url":"https://git.kernel.org/stable/c/cf929c21eeed5bd39873fb14bfdfff963fa6f1da"},{"url":"https://git.kernel.org/stable/c/7aa095ce7d224308cb6979956f0de8607df93d4f"},{"url":"https://git.kernel.org/stable/c/ef41a85a55022e27cdaebf22a6676910b66f65aa"},{"url":"https://git.kernel.org/stable/c/03474a01c199de17a8e2d39b51df6beb9c76e831"},{"url":"https://git.kernel.org/stable/c/f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7"},{"url":"https://git.kernel.org/stable/c/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f"},{"url":"https://git.kernel.org/stable/c/1f9885732248d22f788e4992c739a98c88ab8a55"}],"tags":["cve.org"],"epss":0.00095,"epssPercentile":0.00599,"ingestedAt":"2026-11-05T22:38:32.152Z","slug":"CVE-2026-31480","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix potential deadlock in cpu hotplug with osnoise\n\nThe following sequence may leads deadlock in cpu hotplug:\n\n    task1        task2        task3\n    -----        -----        -----\n\n mutex_lock(&interface_lock)\n\n            [CPU GOING OFFLINE]\n\n            cpus_write_lock();\n            osnoise_cpu_die();\n              kthread_stop(task3);\n                wait_for_completion();\n\n                      osnoise_sleep();\n                        mutex_lock(&interface_lock);\n\n cpus_read_lock();\n\n [DEAD LOCK]\n\nFix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).\n\n## Affected\n\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < cf929c21eeed5bd39873fb14bfdfff963fa6f1da`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 7aa095ce7d224308cb6979956f0de8607df93d4f`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < ef41a85a55022e27cdaebf22a6676910b66f65aa`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 03474a01c199de17a8e2d39b51df6beb9c76e831`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f`\n- `Linux >= bce29ac9ce0bb0b0b146b687ab978378c21e9078 < 1f9885732248d22f788e4992c739a98c88ab8a55`\n- `Linux 5.14`\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":[]}