Linux kernel: prevent priority inheritance violation in rtlock_lock
CVE-2026-53327 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 8a680d54f1adf3e3aa815578684556716fda6f0c is affected.
- Version 4bedcc28469a24fe481a8a31b3584e6070457ddb and below a3383df76f0d7a597066df018409eb9e5e698064 is affected.
- Version 4bedcc28469a24fe481a8a31b3584e6070457ddb and below 3f6a3b24ab7b9d51f6f4778254bef0e5847beb55 is affected.
- 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 6.1.177, <= 6.1.* is unaffected.
- Version 6.6.144, <= 6.6.* is unaffected.
- Version 6.12.95, <= 6.12.* is unaffected.
- Version 6.18.37, <= 6.18.* is unaffected.
- Version 7.0.13, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.