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CVE Record

CVE-2018-5835: If the seq_len is greater then CSR_MAX_RSC_LEN, a buffer overflow in __wlan_hdd_cfg80211_add_key() may occu...

If the seq_len is greater then CSR_MAX_RSC_LEN, a buffer overflow in __wlan_hdd_cfg80211_add_key() may occur when copying keyRSC in Android releases from CAF using the linux kernel (Android for MSM, Firefox OS for MSM, QRD Android) before security patch level 2018-06-05.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-5835 is a buffer overflow issue in Qualcomm CAF-based Android kernel WLAN code. It affects Android for MSM, Firefox OS for MSM, and QRD Android releases before the 2018-06-05 Android security patch level. The sources do not provide CVSS, observed exploitation, or business-impact detail.

Executive priority

Treat as a legacy mobile platform hygiene issue unless affected Qualcomm CAF-based devices remain in service. Prioritize inventory and patch verification over emergency response because the bundle provides no evidence of active exploitation or severity scoring.

Technical view

The issue is in __wlan_hdd_cfg80211_add_key(), where keyRSC copying may overflow if seq_len exceeds CSR_MAX_RSC_LEN. The affected scope is Android releases from CAF using the Linux kernel before security patch level 2018-06-05. A Code Aurora wlan/prima commit is referenced as the fix source.

Likely exposure

Exposure is most likely in legacy Qualcomm CAF-derived Android or MSM firmware builds that did not receive the 2018-06-05 Android security patch level or equivalent vendor kernel WLAN fix.

Exploitation context

The provided sources do not show active exploitation, KEV listing, exploit availability, or confirmed attacker prerequisites. They only describe a possible buffer overflow when an oversized seq_len is handled during WLAN key addition.

Researcher notes

Key gaps are missing CVSS, CWE, exploitability details, and prerequisites. Analysis should stay anchored to the affected CAF Linux-kernel WLAN path and the stated pre-2018-06-05 patch boundary.

Mitigation direction

  • Update affected devices to firmware with Android security patch level 2018-06-05 or later.
  • Confirm OEM updates include the Qualcomm CAF WLAN fix or equivalent backport.
  • Consult Qualcomm, Android, or OEM guidance for model-specific remediation status.
  • Retire or restrict unsupported legacy devices that cannot receive fixed firmware.

Validation and detection

  • Inventory devices using Android for MSM, Firefox OS for MSM, or QRD Android CAF builds.
  • Verify each device reports security patch level 2018-06-05 or later.
  • Check vendor kernel release notes for the referenced WLAN prima fix or equivalent.
  • Flag unsupported devices with unknown CAF kernel provenance for risk review.
Prepared
Confidence
medium
Sources
5

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2018-5835 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
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Qualcomm, Inc.Android for MSM, Firefox OS for MSM, QRD AndroidAll Android releases from CAF using the Linux kernelListed
Weakness

CWE details

No CWE listed

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