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CVE Record

CVE-2026-23164: rocker: fix memory leak in rocker_world_port_post_fini()

In the Linux kernel, the following vulnerability has been resolved: rocker: fix memory leak in rocker_world_port_post_fini() In rocker_world_port_pre_init(), rocker_port->wpriv is allocated with kzalloc(wops->port_priv_size, GFP_KERNEL). However, in rocker_world_port_post_fini(), the memory is only freed when wops->port_post_fini callback is set: if (!wops->port_post_fini) return; wops->port_post_fini(rocker_port); kfree(rocker_port->wpriv); Since rocker_ofdpa_ops does not implement port_post_fini callback (it is NULL), the wpriv memory allocated for each port is never freed when ports are removed. This leads to a memory leak of sizeof(struct ofdpa_port) bytes per port on every device removal. Fix this by always calling kfree(rocker_port->wpriv) regardless of whether the port_post_fini callback exists.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a memory leak in the rocker network switch driver. When rocker ports are removed, some per-port memory may not be released. Over repeated removals, this could reduce available memory and affect availability. There is no cited evidence of active exploitation or a public exploit.

Executive priority

Low for most organizations. Treat as routine kernel maintenance unless rocker is used in production switching, labs, or environments where repeated device removal could affect availability.

Technical view

rocker_world_port_pre_init() allocates rocker_port->wpriv. rocker_world_port_post_fini() only freed it after calling an optional port_post_fini callback. rocker_ofdpa_ops has that callback set to NULL, causing sizeof(struct ofdpa_port) to leak per port on device removal. Stable kernel commits change cleanup to always kfree rocker_port->wpriv.

Likely exposure

Exposure appears limited to Linux systems using the rocker driver, especially OFDPA-related rocker ports. The source does not indicate broad default exposure, internet-facing attack surface, or affected distributions. Kernel and distribution package status should be checked against vendor advisories.

Exploitation context

The cited sources describe a memory leak triggered by port or device removal paths. They do not claim remote exploitation, privilege escalation, data exposure, or active exploitation. KEV status is false in the provided bundle.

Researcher notes

The record lacks CVSS, CWE, and distribution-specific status. The core bug and fix are clear from kernel commit references, but real-world exploitability depends on rocker availability, device lifecycle control, and local operational context.

Mitigation direction

  • Update to a vendor kernel containing the referenced stable rocker fix.
  • Prioritize systems known to load or depend on the rocker driver.
  • If no vendor package is available, monitor vendor kernel guidance.
  • Consider reducing unnecessary rocker usage until patched, where operationally safe.

Validation and detection

  • Inventory Linux kernel versions and distribution security advisories.
  • Check whether the rocker driver is present or used on systems.
  • Confirm the deployed kernel includes the referenced stable commit for its branch.
  • Review system monitoring for memory pressure during rocker device removal testing.
Prepared
Confidence
medium
Sources
9

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-2026-23164 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
1ADP providers
8Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3c, e420114eef4a3a5025a243b89b0dc343101e3d3cunaffected
LinuxLinux4.6, 0, 5.10.249, 5.15.199, 6.1.162, 6.6.123, 6.12.69, 6.18.9, 6.19affected
Weakness

CWE details

No CWE listed

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