Bug 2356595 (CVE-2025-21901)

Summary: CVE-2025-21901 kernel: RDMA/bnxt_re: Add sanity checks on rdev validity
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-04-01 16:01:38 UTC 
In the Linux kernel, the following vulnerability has been resolved:

RDMA/bnxt_re: Add sanity checks on rdev validity

There is a possibility that ulp_irq_stop and ulp_irq_start
callbacks will be called when the device is in detached state.
This can cause a crash due to NULL pointer dereference as
the rdev is already freed.
Comment 1 Robb Gatica 2025-04-02 05:05:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025040133-CVE-2025-21901-8898@gregkh/T