{"id":"CVE-2024-39495","summary":"greybus: Fix use-after-free bug in gb_interface_release due to race condition.","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: Fix use-after-free bug in gb_interface_release due to race condition.\n\nIn gb_interface_create, &intf-\u003emode_switch_completion is bound with\ngb_interface_mode_switch_work. Then it will be started by\ngb_interface_request_mode_switch. Here is the relevant code.\nif (!queue_work(system_long_wq, &intf-\u003emode_switch_work)) {\n\t...\n}\n\nIf we call gb_interface_release to make cleanup, there may be an\nunfinished work. This function will call kfree to free the object\n\"intf\". However, if gb_interface_mode_switch_work is scheduled to\nrun after kfree, it may cause use-after-free error as\ngb_interface_mode_switch_work will use the object \"intf\".\nThe possible execution flow that may lead to the issue is as follows:\n\nCPU0                            CPU1\n\n                            |   gb_interface_create\n                            |   gb_interface_request_mode_switch\ngb_interface_release        |\nkfree(intf) (free)          |\n                            |   gb_interface_mode_switch_work\n                            |   mutex_lock(&intf-\u003emutex) (use)\n\nFix it by canceling the work before kfree.","modified":"2026-04-02T12:17:02.411568Z","published":"2024-07-12T12:20:31.022Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39495.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03ea2b129344152157418929f06726989efc0445"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0b8fba38bdfb848fac52e71270b2aa3538c996ea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c9c5d7f26acc2c669c1dcf57d1bb43ee99220ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/74cd0a421896b2e07eafe7da4275302bfecef201"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a733d69a4a59c2d08620e6589d823c24be773dc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb071f5c75d4b1c177824de74ee75f9dd34123b9"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39495.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39495"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"55742d2a071a569bf20f90d37b1b5b8a25a3f882"},{"fixed":"74cd0a421896b2e07eafe7da4275302bfecef201"},{"fixed":"2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83"},{"fixed":"fb071f5c75d4b1c177824de74ee75f9dd34123b9"},{"fixed":"9a733d69a4a59c2d08620e6589d823c24be773dc"},{"fixed":"0b8fba38bdfb848fac52e71270b2aa3538c996ea"},{"fixed":"03ea2b129344152157418929f06726989efc0445"},{"fixed":"5c9c5d7f26acc2c669c1dcf57d1bb43ee99220ce"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39495.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}