{"id":"CVE-2026-64033","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Fix use-after-free in path file creation cleanup\n\nIn the error path of rtrs_srv_create_path_files(), the sysfs root folders\nmay already have been created and…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Fix use-after-free in path file creation cleanup\n\nIn the error path of rtrs_srv_create_path_files(), the sysfs root folders\nmay already have been created and…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.15.61, < 5.15.209","linux_kernel >= 5.17, < 6.1.175","linux_kernel >= 6.2, < 6.6.142","linux_kernel >= 6.7, < 6.12.92","linux_kernel >= 6.13, < 6.18.34","linux_kernel >= 6.19, < 7.0.11","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.11"],"published":"2026-07-19","updated":"2026-10-13","sourceUpdated":"2026-10-13T15:32:56.607","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64033","references":[{"url":"https://git.kernel.org/stable/c/00904a73272b9f3ef3952fe69a833909dccad1ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/01e42aabaf7632beb4bf235c7238b96c746d4144","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/548f3956e53a7f7bde912d8129010b8986d5e602","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5b74373390113fba798a76b483837029ab010fef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92060ab1c5115674cf319175550f85f68405121f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b0e9706fb2859064bb6c677554c4d20c713aa8e0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eae62c5451e67e8b033c1681fd3b85d7e9a9a28f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00488,"epssPercentile":0.40337,"ingestedAt":"2026-10-13T16:35:46.699Z","slug":"CVE-2026-64033","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs: Fix use-after-free in path file creation cleanup\n\nIn the error path of rtrs_srv_create_path_files(), the sysfs root folders\nmay already have been created and srv_path->kobj may already have been\ninitialized. If a later step fails, the cleanup currently calls\nkobject_put(&srv_path->kobj) before\nrtrs_srv_destroy_once_sysfs_root_folders(srv_path).\n\nkobject_put() may drop the last reference to srv_path->kobj and invoke the\nrelease callback, rtrs_srv_release(), which frees srv_path. The following\ncall to rtrs_srv_destroy_once_sysfs_root_folders(srv_path) then\ndereferences srv_path internally to access srv_path->srv, resulting in a\nuse-after-free.\n\nThis failure path is reached before rtrs_srv_create_path_files() returns\nsuccess, so the successful-path lifetime handling is not involved.\n\nFix this by destroying the sysfs root folders before calling\nkobject_put(&srv_path->kobj), so srv_path is still valid while the helper\naccesses it.\n\nThis issue was found by a static analysis tool I am developing.\n\n## Affected\n\n- `linux_kernel >= 5.15.61, < 5.15.209`\n- `linux_kernel >= 5.17, < 6.1.175`\n- `linux_kernel >= 6.2, < 6.6.142`\n- `linux_kernel >= 6.7, < 6.12.92`\n- `linux_kernel >= 6.13, < 6.18.34`\n- `linux_kernel >= 6.19, < 7.0.11`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.11`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}