{"id":"CVE-2024-35887","title":"ax25: fix use-after-free bugs caused by ax25_ds_del_timer","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\n\nWhen the ax25 device is detaching, the ax25_dev_device_down()\ncalls ax25_ds_del_timer() to cleanup the slave_…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28f2d36ac52225a13e020c2589833f1816a0cfc6","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 74204bf9050f7627aead9875fe4e07ba125cb19b","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c6a368f9c7af4c14b14d390c2543af8001c9bdb9","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd819ad3ecf6f3c232a06b27423ce9ed8c20da89","Linux 2.6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2024-05-29T18:31:26.964668Z"},"published":"2024-05-19","updated":"2026-09-14","sourceUpdated":"2026-09-14T11:57:42.938Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-35887","references":[{"url":"https://git.kernel.org/stable/c/28f2d36ac52225a13e020c2589833f1816a0cfc6"},{"url":"https://git.kernel.org/stable/c/8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf"},{"url":"https://git.kernel.org/stable/c/74204bf9050f7627aead9875fe4e07ba125cb19b"},{"url":"https://git.kernel.org/stable/c/c6a368f9c7af4c14b14d390c2543af8001c9bdb9"},{"url":"https://git.kernel.org/stable/c/fd819ad3ecf6f3c232a06b27423ce9ed8c20da89"}],"tags":["cve.org"],"epss":0.00341,"epssPercentile":0.27764,"ingestedAt":"2026-09-14T15:23:07.460Z","slug":"CVE-2024-35887","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nax25: fix use-after-free bugs caused by ax25_ds_del_timer\n\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\n      (Thread 1)          |      (Thread 2)\n                          | ax25_ds_timeout()\nax25_dev_device_down()    |\n  ax25_ds_del_timer()     |\n    del_timer()           |\n  ax25_dev_put() //FREE   |\n                          |  ax25_dev-> //USE\n\nIn order to mitigate bugs, when the device is detaching, use\ntimer_shutdown_sync() to stop the timer.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 28f2d36ac52225a13e020c2589833f1816a0cfc6`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8a912ef5b7c5d14fb41b9a7935d1df5bb87058bf`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 74204bf9050f7627aead9875fe4e07ba125cb19b`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c6a368f9c7af4c14b14d390c2543af8001c9bdb9`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd819ad3ecf6f3c232a06b27423ce9ed8c20da89`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}