Bug 2492292 (CVE-2026-53128)

Summary: CVE-2026-53128 kernel: drbd: Balance RCU calls in drbd_adm_dump_devices()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's drbd component. Specifically, an imbalance in RCU (Read-Copy Update) calls within the `drbd_adm_dump_devices()` function could occur, where `rcu_read_lock()` was not properly invoked before `rcu_read_unlock()`. This concurrency issue, identified by a thread-safety analyzer, may lead to system instability or a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-24 18:03:50 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drbd: Balance RCU calls in drbd_adm_dump_devices()

Make drbd_adm_dump_devices() call rcu_read_lock() before
rcu_read_unlock() is called. This has been detected by the Clang
thread-safety analyzer.
Comment 1 Mauro Matteo Cascella 2026-06-24 18:27:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062418-CVE-2026-53128-5384@gregkh/T