CVE-2026-53327 PUBLISHED

debugobjects: Do not fill_pool() if pi_blocked_on

Assigner: Linux
Reserved: 09.06.2026 Published: 01.07.2026 Updated: 01.07.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 4bedcc28469a24fe481a8a31b3584e6070457ddb to 3a408cae608d9c075dd3a9e5cfc03b3cb0726863 (excl.)
  • affected from 4bedcc28469a24fe481a8a31b3584e6070457ddb to 33bee10644f8fff3b1a0187ad5ad34513e5e8e72 (excl.)
  • affected from 4bedcc28469a24fe481a8a31b3584e6070457ddb to 5f41161059fd0f1bbf18c90f3180e38cc45a14eb (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.15 is affected
  • unaffected from 0 to 5.15 (excl.)
  • unaffected from 6.18.37 to 6.18.* (incl.)
  • unaffected from 7.0.13 to 7.0.* (incl.)
  • unaffected from 7.1 to * (incl.)

References