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CVE Record

CVE-2018-11506: The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users...

The sr_do_ioctl function in drivers/scsi/sr_ioctl.c in the Linux kernel through 4.16.12 allows local users to cause a denial of service (stack-based buffer overflow) or possibly have unspecified other impact because sense buffers have different sizes at the CDROM layer and the SCSI layer, as demonstrated by a CDROMREADMODE2 ioctl call.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel local denial-of-service flaw in CD-ROM/SCSI handling. A local user could trigger a stack-based buffer overflow through CD-ROM ioctl handling, potentially crashing the system or causing unspecified effects. The provided sources do not describe remote exploitation or active exploitation.

Executive priority

Treat this as a routine but real kernel patching item. It is not supported as remotely exploitable or actively exploited by the provided sources, but local denial-of-service risk matters on shared systems and environments running untrusted workloads.

Technical view

The flaw is in sr_do_ioctl in drivers/scsi/sr_ioctl.c in Linux kernels through 4.16.12. The CVE says sense buffer sizes differed between the CDROM layer and SCSI layer, causing a stack-based buffer overflow. Upstream and vendor references indicate kernel updates addressed the issue.

Likely exposure

Exposure is most relevant to Linux systems running affected kernels, especially where untrusted local users or workloads can reach CD-ROM/SCSI device ioctl paths. The bundle lists vendor advisories from Ubuntu, Debian, and Red Hat, but does not provide a complete affected-product matrix.

Exploitation context

The CVE describes local-user impact only. It mentions denial of service and possible unspecified other impact. CISA KEV status is false in the bundle, and no cited source here supports active exploitation in the wild.

Researcher notes

Evidence is limited to the CVE description, vendor advisories, and upstream commit reference. The affected field in the bundle is not normalized, and no CVSS vector is supplied. Avoid expanding impact beyond local DoS and unspecified possible impact without vendor-specific confirmation.

Mitigation direction

  • Apply the relevant vendor kernel security update for the deployed distribution.
  • Prioritize multi-user systems and hosts running untrusted local workloads.
  • Check vendor advisories before assuming a specific package version is fixed.
  • Reboot systems after kernel updates where required by the vendor.

Validation and detection

  • Inventory Linux kernel versions and flag systems at or before 4.16.12.
  • Compare installed kernel packages against Ubuntu, Debian, or Red Hat advisories as applicable.
  • Confirm the upstream fix commit or vendor backport is present.
  • Document systems with local untrusted users as higher validation priority.
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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CVE-2018-11506 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
10Source 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
n/an/an/aListed
Weakness

CWE details

No CWE listed

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