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CVE Record

CVE-2022-49405: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()

In the Linux kernel, the following vulnerability has been resolved: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan() This code has a check to prevent read overflow but it needs another check to prevent writing beyond the end of the ->Ssid[] array.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2022-49405 is a Linux kernel driver bug in the staging r8188eu wireless code. A scan operation could write past the end of an SSID buffer. Business urgency depends on whether affected systems run kernels with this driver present and usable; the source bundle provides no severity score or active exploitation evidence.

Executive priority

Track and remediate through normal kernel patch management unless internal inventory shows widespread r8188eu use. Escalate for managed endpoints or devices that rely on this driver.

Technical view

In rtw_wx_set_scan(), existing validation prevented a read overflow but did not prevent writes beyond the ->Ssid[] array. The Linux kernel resolved this with stable commits. The bundle lists affected Linux versions and has no CVSS, CWE, or confirmed exploit details.

Likely exposure

Likely limited to Linux systems using affected kernel builds where the staging r8188eu driver is included and reachable. General exposure cannot be assumed from Linux presence alone; validate driver availability and vendor backport status.

Exploitation context

The source bundle does not report active exploitation, and KEV status is false. No public exploit evidence is provided here. Treat exploitability as unconfirmed, not absent.

Researcher notes

Key unknowns are triggerability, privilege requirements, and impact severity. The available description supports an out-of-bounds write in scan handling but does not establish exploitation, crash reliability, privilege escalation, or remote reachability.

Mitigation direction

  • Review Linux distribution advisories for CVE-2022-49405 and r8188eu fixes.
  • Update to a kernel containing the referenced stable commits or vendor backport.
  • Disable or remove the r8188eu driver where it is not required.
  • Prioritize wireless-capable endpoints, appliances, and embedded Linux builds first.

Validation and detection

  • Inventory kernel versions against the affected version data in the CVE record.
  • Check whether the r8188eu driver is built, loaded, or packaged.
  • Confirm vendor kernels include one of the referenced stable fixes or equivalent backport.
  • Document systems where the driver is absent as lower exposure.
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

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.

ATT&CK lookup starting points

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CVE-2022-49405 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
LinuxLinux2b42bd58b32155a1be4dd78991845dec05aaef9e, 2b42bd58b32155a1be4dd78991845dec05aaef9e, 2b42bd58b32155a1be4dd78991845dec05aaef9e, 2b42bd58b32155a1be4dd78991845dec05aaef9eunaffected
LinuxLinux5.15, 0, 5.15.46, 5.17.14, 5.18.3, 5.19affected
Weakness

CWE details

No CWE listed

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