CVE-2026-53327

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < 8a680d54f1adf3e3aa815578684556716fda6f0caffected
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < a3383df76f0d7a597066df018409eb9e5e698064affected
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < 3f6a3b24ab7b9d51f6f4778254bef0e5847beb55affected
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < 3a408cae608d9c075dd3a9e5cfc03b3cb0726863affected
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < 33bee10644f8fff3b1a0187ad5ad34513e5e8e72affected
LinuxLinux4bedcc28469a24fe481a8a31b3584e6070457ddb < 5f41161059fd0f1bbf18c90f3180e38cc45a14ebaffected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux6.1.177 <= 6.1.*unaffected
LinuxLinux6.6.144 <= 6.6.*unaffected
LinuxLinux6.12.95 <= 6.12.*unaffected
LinuxLinux6.18.37 <= 6.18.*unaffected
LinuxLinux7.0.13 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References