CVE-2024-35972: bnxt_en: Fix possible memory leak in bnxt_rdma_aux_device_init()
In the Linux kernel, the following vulnerability has been resolved:
bnxt_en: Fix possible memory leak in bnxt_rdma_aux_device_init()
If ulp = kzalloc() fails, the allocated edev will leak because it is
not properly assigned and the cleanup path will not be able to free it.
Fix it by assigning it properly immediately after allocation.
Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory leak in the bnxt_en driver initialization path. If one allocation fails, previously allocated memory may not be freed. The sources do not show remote code execution, privilege escalation, or active exploitation.
Executive priority
Treat as routine kernel hygiene unless bnxt_en-dependent systems are business-critical or unstable. Patch through normal maintenance windows, with faster handling for exposed infrastructure showing memory pressure or driver initialization failures.
Technical view
bnxt_rdma_aux_device_init() can leak an allocated edev object when a later kzalloc() for ulp fails. The fix assigns edev immediately after allocation so cleanup can release it. Impact appears limited to resource leakage under failure conditions.
Likely exposure
Exposure is likely limited to Linux systems running affected kernel builds where the bnxt_en RDMA auxiliary initialization path is present or used. The bundle does not provide distribution-specific package names or configuration requirements.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not claim active exploitation. The described condition depends on allocation failure during driver initialization, suggesting reliability or resource-exhaustion concern rather than a demonstrated attack path.
Researcher notes
Evidence is limited to the kernel fix description and stable commit references. No CVSS, CWE, exploit evidence, or vendor-specific package mapping is included in the bundle, so exposure assessment should be confirmed against deployed kernels and distribution advisories.
Mitigation direction
Update to a kernel containing the referenced stable fixes.
Check Linux distribution advisories for backported kernel packages.
Prioritize systems using affected kernels with bnxt_en functionality.
Track memory pressure or repeated driver initialization failures until patched.
Validation and detection
Inventory running Linux kernel versions against vendor advisories.
Confirm whether bnxt_en functionality is present or loaded on systems.
Verify the kernel includes the referenced stable commit fix.
Review system telemetry for memory leak symptoms during driver initialization.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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CVE-2024-35972 mapping review
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