CVE-2026-64033 (GCVE-0-2026-64033)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-20 13:42
VLAI
Title
RDMA/rtrs: Fix use-after-free in path file creation cleanup
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: bab17b761c8974a869b04462be5d4dd9aad366b4 , < 01e42aabaf7632beb4bf235c7238b96c746d4144 (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < 548f3956e53a7f7bde912d8129010b8986d5e602 (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < 00904a73272b9f3ef3952fe69a833909dccad1ef (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < 92060ab1c5115674cf319175550f85f68405121f (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < eae62c5451e67e8b033c1681fd3b85d7e9a9a28f (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < b0e9706fb2859064bb6c677554c4d20c713aa8e0 (git)
Affected: ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 , < 5b74373390113fba798a76b483837029ab010fef (git)
Affected: 5.15.61 , < 5.15.209 (semver)
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Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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Detection rules are retrieved from Rulezet.