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CVE Record

CVE-2025-68759: wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring()

In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: Fix potential memory leaks in rtl8180_init_rx_ring() In rtl8180_init_rx_ring(), memory is allocated for skb packets and DMA allocations in a loop. When an allocation fails, the previously successful allocations are not freed on exit. Fix that by jumping to err_free_rings label on error, which calls rtl8180_free_rx_ring() to free the allocations. Remove the free of rx_ring in rtl8180_init_rx_ring() error path, and set the freed priv->rx_buf entry to null, to avoid double free.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel Wi-Fi driver cleanup flaw. If receive-ring initialization fails, earlier memory allocations may be left behind. The source describes memory leakage, not data theft or code execution. Business urgency depends on whether affected Linux kernels and the rtl818x driver are present in your fleet.

Executive priority

Treat this as a routine kernel maintenance item unless your environment heavily depends on rtl818x Wi-Fi devices. There is no cited evidence of active exploitation, but kernel memory-management fixes should not remain untracked.

Technical view

rtl8180_init_rx_ring() allocates SKB packets and DMA resources in a loop. On allocation failure, it previously exited without freeing successful prior allocations. The fix routes failures through rtl8180_free_rx_ring(), removes a separate rx_ring free path, and nulls freed priv->rx_buf entries to prevent double free.

Likely exposure

Exposure is most plausible on Linux systems using affected kernel builds with the rtl818x/rtl8180 Wi-Fi driver code reachable. The bundle does not prove all listed versions are exploitable in a given distribution, because downstream backports and driver configuration matter.

Exploitation context

The source bundle does not report active exploitation, public exploit code, CVSS, CWE, or KEV listing. It describes an error-path memory leak during driver initialization after allocation failure, so exploitation context remains incomplete.

Researcher notes

Evidence is limited to the CVE description and Linux stable commit references. The record lacks CVSS, CWE, attack vector, and proof of exploitability. Focus analysis on allocation-failure paths, driver reachability, and whether downstream kernels carried the specific cleanup fix.

Mitigation direction

  • Check distribution or kernel vendor advisories for CVE-2025-68759.
  • Update to a kernel package that includes the referenced stable fixes.
  • Prioritize systems using rtl818x-supported Wi-Fi hardware or modules.
  • If patching is delayed, assess whether the affected driver can be disabled safely.

Validation and detection

  • Inventory Linux kernel versions across laptops, servers, and embedded devices.
  • Identify systems where rtl818x or rtl8180 driver support is enabled or loaded.
  • Compare installed kernel changelogs against the referenced stable commits.
  • Confirm vendor packages explicitly mention CVE-2025-68759 or the rtl8180_init_rx_ring fix.
  • Track exceptions where downstream backports make version numbers misleading.
Prepared
Confidence
medium
Sources
10

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-2025-68759 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
9Source 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
LinuxLinuxf653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627, f653211197f3841f383fa9757ef8ce182c6cf627unaffected
LinuxLinux2.6.25, 0, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.63, 6.17.13, 6.18.2, 6.19affected
Weakness

CWE details

No CWE listed

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