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{"bugzilla": {"description": "kernel: ax25: fix use-after-free bugs caused by ax25_ds_del_timer", "id": "2281695", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281695"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\nWhen the ax25 device is detaching, the ax25_dev_device_down()\ncalls ax25_ds_del_timer() to cleanup the slave_timer. When\nthe timer handler is running, the ax25_ds_del_timer() that\ncalls del_timer() in it will return directly. As a result,\nthe use-after-free bugs could happen, one of the scenarios\nis shown below:\n(Thread 1) | (Thread 2)\n| ax25_ds_timeout()\nax25_dev_device_down() |\nax25_ds_del_timer() |\ndel_timer() |\nax25_dev_put() //FREE |\n| ax25_dev-> //USE\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer."], "name": "CVE-2024-35887", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35887\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35887\nhttps://lore.kernel.org/linux-cve-announce/2024051947-CVE-2024-35887-9c08@gregkh/T"], "threat_severity": "Moderate"}

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