CVE-2026-64033

CVE CVE-2026-64033EUVD EUVD-2026-45606Published 2026-07-19T15:39:22.000ZLast changed 2026-08-05T12:38:27.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: RDMA/rtrs: Fix use-after-free in path file creation cleanup In the error path of rtrs_srv_create_path_files(), the sysfs root folders may already have been created and srv_path->kobj may already have been initialized. If a later step fails, the cleanup currently calls kobject_put(&srv_path->kobj) before rtrs_srv_destroy_once_sysfs_root_folders(srv_path). kobject_put() may drop the last reference to srv_path->kobj and invoke the release callback, rtrs_srv_release(), which frees srv_path. The following call to rtrs_srv_destroy_once_sysfs_root_folders(srv_path) then dereferences srv_path internally to access srv_path->srv, resulting in a use-after-free. This failure path is reached before rtrs_srv_create_path_files() returns success, so the successful-path lifetime handling is not involved. Fix this by destroying the sysfs root folders before calling kobject_put(&srv_path->kobj), so srv_path is still valid while the helper accesses it. This issue was found by a static analysis tool I am developing.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.34; patch: 6.1.175; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <5b74373390113fba798a76b483837029ab010fef; patch: 0; patch: 6.6.142; 5.17; 5.15.61 <5.15.209; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <00904a73272b9f3ef3952fe69a833909dccad1ef; patch: 7.1; bab17b761c8974a869b04462be5d4dd9aad366b4 <01e42aabaf7632beb4bf235c7238b96c746d4144; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <b0e9706fb2859064bb6c677554c4d20c713aa8e0; patch: 6.12.92; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <92060ab1c5115674cf319175550f85f68405121f; patch: 5.15.209; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <548f3956e53a7f7bde912d8129010b8986d5e602; ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 <eae62c5451e67e8b033c1681fd3b85d7e9a9a28f; patch: 7.0.11

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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