CVE-2026-53327
Published: July 2, 2026Last modified: July 6, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: debugobjects: Do not fill_pool() if pi_blocked_on On RT enabled kernels, fill_pool() ends up calling rtlock_lock(), which asserts if current::pi_blocked_on is set, because a task can obviously only block on one lock as otherwise the priority inheritenace chain gets corrupted. Prevent this by expanding the conditional to take current::pi_blocked_on into account.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.177-r0) |
| 25 LTS | linux-lts | Fixed (6.12.95-r0) | |
| Stream | linux-lts | Fixed (6.18.38-r0) |
References
- https://git.kernel.org/stable/c/33bee10644f8fff3b1a0187ad5ad34513e5e8e72
- https://git.kernel.org/stable/c/3a408cae608d9c075dd3a9e5cfc03b3cb0726863
- https://git.kernel.org/stable/c/3f6a3b24ab7b9d51f6f4778254bef0e5847beb55
- https://git.kernel.org/stable/c/5f41161059fd0f1bbf18c90f3180e38cc45a14eb
- https://git.kernel.org/stable/c/8a680d54f1adf3e3aa815578684556716fda6f0c
- https://git.kernel.org/stable/c/a3383df76f0d7a597066df018409eb9e5e698064