CVE-2026-64033RDMA/rtrs: Fix use-after-free in path file creation cleanup
- 9.8CriticalCVSS base score
- 0.49%Exploitation in 30 daysEPSS · top 57% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
Published
- 17 days later
· 17 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.49% · top 57% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected bab17b761c8974a869b04462be5d4dd9aad366b4 – < 01e42aabaf7632beb4bf235c7238b96c746d4144
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < 548f3956e53a7f7bde912d8129010b8986d5e602
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < 00904a73272b9f3ef3952fe69a833909dccad1ef
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < 92060ab1c5115674cf319175550f85f68405121f
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < eae62c5451e67e8b033c1681fd3b85d7e9a9a28f
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < b0e9706fb2859064bb6c677554c4d20c713aa8e0
- affected ae4c81644e9105d9f7f713bb0d444737bb6a0cf1 – < 5b74373390113fba798a76b483837029ab010fef
- affected 5.15.61 – < 5.15.209
- affected 5.17
- unaffected < 5.17
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References7
- https://git.kernel.org/stable/c/01e42aabaf7632beb4bf235c7238b96c746d4144 (opens in a new tab)
- https://git.kernel.org/stable/c/548f3956e53a7f7bde912d8129010b8986d5e602 (opens in a new tab)
- https://git.kernel.org/stable/c/00904a73272b9f3ef3952fe69a833909dccad1ef (opens in a new tab)
- https://git.kernel.org/stable/c/92060ab1c5115674cf319175550f85f68405121f (opens in a new tab)
- https://git.kernel.org/stable/c/eae62c5451e67e8b033c1681fd3b85d7e9a9a28f (opens in a new tab)
- https://git.kernel.org/stable/c/b0e9706fb2859064bb6c677554c4d20c713aa8e0 (opens in a new tab)
- https://git.kernel.org/stable/c/5b74373390113fba798a76b483837029ab010fef (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45606 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64033)Record last updated .