CVE-2026-53327
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 versions
Linux kernel versions
5.15
and later are affected. Fixed in
6.18.37,
7.0.13,
7.1
and their respective stable series.
References
3 totalFrequently asked questions
-
What is CVE-2026-53327?
CVE-2026-53327 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.15 onward and has been patched in 6.18.37, 7.0.13 and 7.1. CVE-2026-53327 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-53327?
Yes — CVE-2026-53327 has been patched. Fixed versions include 6.18.37, 7.0.13 and 7.1. If you are running Linux kernel 5.15 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-53327 actively exploited?
No — CVE-2026-53327 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.