Local privilege escalation via premature RDMA deallocation
Published Oct 1, 2025 · Updated Oct 1, 2025
Use-after-free in Linux kernel 6.3 through 6.4.10 allows local users to corrupt kernel memory during bnxt_re device removal. The removal path calls ib_dealloc_device before bnxt_re_dev_uninit finishes using the freed rdev object, enabling stale reads, writes, and frees. The gate is local access plus bnxt_re device teardown; reclaiming rdev exposes kernel data, corrupts memory, or panics the host.
Summary
What happened
Use-after-free in Linux kernel 6.3 through 6.4.10 allows local users to corrupt kernel memory during bnxt_re device removal. The removal path calls ib_dealloc_device before bnxt_re_dev_uninit finishes using the freed rdev object, enabling stale reads, writes, and frees. The gate is local access plus bnxt_re device teardown; reclaiming rdev exposes kernel data, corrupts memory, or panics the host.
The record
- CVE
- CVE-2023-53504
- Published
- Oct 1, 2025
- Updated
- Oct 1, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 1, 2025CVE publishedPublication date reported by the CVE source.
- Oct 1, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=6.3
- Affected versionversion=6d758147c7b80a46465f72e9e6294d244ee98a21 <5363fc488da579923edf6a2fdca3d3b651dd800b
- Affected versionversion=6d758147c7b80a46465f72e9e6294d244ee98a21 <c95863f6d970ef968e7c1f3c481f72a4b0734654
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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