CVE-2026-53327 is a vulnerability in Linux Kernel
Published on July 1, 2026
debugobjects: Do not fill_pool() if pi_blocked_on
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.
Products Associated with CVE-2026-53327
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Affected Versions
Linux:- Version 4bedcc28469a24fe481a8a31b3584e6070457ddb and below 3a408cae608d9c075dd3a9e5cfc03b3cb0726863 is affected.
- Version 4bedcc28469a24fe481a8a31b3584e6070457ddb and below 33bee10644f8fff3b1a0187ad5ad34513e5e8e72 is affected.
- Version 4bedcc28469a24fe481a8a31b3584e6070457ddb and below 5f41161059fd0f1bbf18c90f3180e38cc45a14eb is affected.
- Version 5.15 is affected.
- Before 5.15 is unaffected.
- Version 6.18.37, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.