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CVE Record

CVE-2023-53201: RDMA/bnxt_re: wraparound mbox producer index

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: wraparound mbox producer index Driver is not handling the wraparound of the mbox producer index correctly. Currently the wraparound happens once u32 max is reached. Bit 31 of the producer index register is special and should be set only once for the first command. Because the producer index overflow setting bit31 after a long time, FW goes to initialization sequence and this causes FW hang. Fix is to wraparound the mbox producer index once it reaches u16 max.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can cause a firmware hang in the RDMA bnxt_re driver after prolonged mailbox index activity. The public record describes reliability impact, not data theft or remote compromise. Business urgency is highest for Linux systems that depend on this RDMA driver for production networking or storage paths.

Executive priority

Treat as a targeted infrastructure stability risk, not a confirmed breach risk. Patch during the next appropriate kernel maintenance window, faster where RDMA availability is business-critical.

Technical view

The bnxt_re driver mishandles wraparound of the mailbox producer index. Instead of wrapping at u16 max, it can reach u32 overflow and set bit 31, which firmware treats specially for first-command initialization. That can send firmware into initialization and hang it. Stable kernel commits implement the corrected wraparound behavior.

Likely exposure

Exposure appears limited to Linux systems running affected kernel versions with the RDMA bnxt_re driver in use. The source bundle lists affected Linux versions but does not define complete distribution package ranges.

Exploitation context

No active exploitation is stated in the provided sources, and the CVE is not marked KEV. The sources describe a driver logic flaw that emerges after long-running producer index activity; they do not provide exploitability details or attacker requirements.

Researcher notes

Evidence is narrow but clear: the resolved condition is mailbox producer index wraparound in RDMA/bnxt_re. There is no CVSS, CWE, KEV listing, or public exploit evidence in the supplied bundle.

Mitigation direction

  • Update to a kernel containing the referenced stable fixes.
  • Prioritize production hosts that use the bnxt_re RDMA driver.
  • Use distribution vendor advisories to map fixed package versions.
  • If patching is delayed, request vendor guidance for supported temporary workarounds.

Validation and detection

  • Inventory Linux kernel versions against the CVE affected version data.
  • Identify systems where the bnxt_re RDMA driver is present or loaded.
  • Confirm installed kernels include the relevant stable fix commit.
  • Review vendor advisories for distribution-specific backport status.
Prepared
Confidence
medium
Sources
8

Public sources used

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-2023-53201 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
7Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1ac5a404797523cedaf424a3aaa3cf8f9548dff8, 1ac5a404797523cedaf424a3aaa3cf8f9548dff8, 1ac5a404797523cedaf424a3aaa3cf8f9548dff8, 1ac5a404797523cedaf424a3aaa3cf8f9548dff8, 1ac5a404797523cedaf424a3aaa3cf8f9548dff8, 1ac5a404797523cedaf424a3aaa3cf8f9548dff8unaffected
LinuxLinux4.11, 0, 5.10.188, 5.15.121, 6.1.39, 6.3.13, 6.4.4, 6.5affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.