CVE-2026-64033
RDMA/rtrs: Fix use-after-free in path file creation cleanup
Description
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.
INFO
Published Date :
July 19, 2026, 4:17 p.m.
Last Modified :
July 20, 2026, 3:17 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64033
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Destroy sysfs root folders before kobject_put.
- Ensure srv_path is valid when accessing helper functions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64033.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64033 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64033
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-64033 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64033 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'bab17b761c8974a869b04462be5d4dd9aad366b4', 'lessThan': '01e42aabaf7632beb4bf235c7238b96c746d4144', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': '548f3956e53a7f7bde912d8129010b8986d5e602', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': '00904a73272b9f3ef3952fe69a833909dccad1ef', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': '92060ab1c5115674cf319175550f85f68405121f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': 'eae62c5451e67e8b033c1681fd3b85d7e9a9a28f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': 'b0e9706fb2859064bb6c677554c4d20c713aa8e0', 'versionType': 'git'}, {'status': 'affected', 'version': 'ae4c81644e9105d9f7f713bb0d444737bb6a0cf1', 'lessThan': '5b74373390113fba798a76b483837029ab010fef', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.61', 'lessThan': '5.15.209', 'versionType': 'semver'}], 'programFiles': ['drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.142', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.92', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.34', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.11', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c'], 'defaultStatus': 'affected'}] Added Description 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. Added Reference https://git.kernel.org/stable/c/00904a73272b9f3ef3952fe69a833909dccad1ef Added Reference https://git.kernel.org/stable/c/01e42aabaf7632beb4bf235c7238b96c746d4144 Added Reference https://git.kernel.org/stable/c/548f3956e53a7f7bde912d8129010b8986d5e602 Added Reference https://git.kernel.org/stable/c/5b74373390113fba798a76b483837029ab010fef Added Reference https://git.kernel.org/stable/c/92060ab1c5115674cf319175550f85f68405121f Added Reference https://git.kernel.org/stable/c/b0e9706fb2859064bb6c677554c4d20c713aa8e0 Added Reference https://git.kernel.org/stable/c/eae62c5451e67e8b033c1681fd3b85d7e9a9a28f