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CVE Record

CVE-2023-54301: serial: 8250_bcm7271: fix leak in `brcmuart_probe`

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_bcm7271: fix leak in `brcmuart_probe` Smatch reports: drivers/tty/serial/8250/8250_bcm7271.c:1120 brcmuart_probe() warn: 'baud_mux_clk' from clk_prepare_enable() not released on lines: 1032. The issue is fixed by using a managed clock.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2023-54301 is a Linux kernel driver resource leak in the Broadcom BCM7271 8250 serial driver. The source describes a clock enabled during device probing that was not released on one path. No CVSS score, CWE, or active exploitation evidence is provided.

Executive priority

Treat this as a targeted kernel maintenance item, not an emergency, unless BCM7271-based devices are business-critical or vendor guidance raises severity. Patch through normal kernel update cycles and verify embedded or appliance exposure.

Technical view

The flaw is in drivers/tty/serial/8250/8250_bcm7271.c brcmuart_probe(). Smatch reported that baud_mux_clk from clk_prepare_enable() was not released on a reported path. The kernel fix changes this to use a managed clock, reducing cleanup mistakes during probe failure handling.

Likely exposure

Exposure appears limited to Linux systems using the 8250_bcm7271 serial driver, typically Broadcom BCM7271-based hardware. The bundle lists Linux kernel versions including 5.13, 5.15.113, 6.1.30, 6.3.4, and 6.4, but the exact version-range semantics are incomplete here.

Exploitation context

The source bundle does not show KEV listing, public exploitation, exploit maturity, or remote attack context. Based only on the provided text, this is a kernel driver cleanup bug found by static analysis, not a documented actively exploited issue.

Researcher notes

Evidence is sparse: the bundle provides a driver path, Smatch warning, affected Linux entries, and stable commit URLs. It does not provide CVSS, CWE, attack requirements, impact details, or proof of exploitability. Avoid over-scoping beyond BCM7271 serial driver exposure.

Mitigation direction

  • Check your kernel vendor advisory for CVE-2023-54301 applicability.
  • Update to a kernel build containing the referenced stable fixes.
  • Prioritize BCM7271-based devices or systems with 8250_bcm7271 enabled.
  • If unsure, request confirmation from the OS or appliance vendor.

Validation and detection

  • Identify whether the running kernel includes the 8250_bcm7271 driver.
  • Compare the kernel build against vendor-fixed releases for CVE-2023-54301.
  • Review kernel package changelogs for the referenced stable commits.
  • Track remediation through normal kernel inventory and patch compliance tooling.
Prepared
Confidence
medium
Sources
6

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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ATT&CK lookup starting points

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CVE-2023-54301 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
5Source 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
LinuxLinux41a469482de257ea8db43cf74b6311bd055de030, 41a469482de257ea8db43cf74b6311bd055de030, 41a469482de257ea8db43cf74b6311bd055de030, 41a469482de257ea8db43cf74b6311bd055de030unaffected
LinuxLinux5.13, 0, 5.15.113, 6.1.30, 6.3.4, 6.4affected
Weakness

CWE details

No CWE listed

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