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CVE Record

CVE-2026-23087: scsi: xen: scsiback: Fix potential memory leak in scsiback_remove()

In the Linux kernel, the following vulnerability has been resolved: scsi: xen: scsiback: Fix potential memory leak in scsiback_remove() Memory allocated for struct vscsiblk_info in scsiback_probe() is not freed in scsiback_remove() leading to potential memory leaks on remove, as well as in the scsiback_probe() error paths. Fix that by freeing it in scsiback_remove().

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is a memory leak in the Xen SCSI backend cleanup path. It matters mainly for systems using Xen virtualization with scsiback. The public record does not provide a CVSS score, active exploitation evidence, or a detailed business impact statement.

Executive priority

Treat as a targeted kernel maintenance item, not an emergency based on current evidence. Raise priority for Xen virtualization infrastructure or affected vendor appliances where memory pressure could affect service stability.

Technical view

The flaw is in Linux scsi/xen/scsiback: memory allocated for struct vscsiblk_info in scsiback_probe() was not freed in scsiback_remove() or some probe error paths. Stable kernel commits add cleanup to prevent leaked memory during removal/error handling.

Likely exposure

Exposure appears limited to Linux kernels using the Xen SCSI backend driver. Virtualization hosts, appliances, or products embedding affected Linux versions should be checked against vendor kernel builds and the listed stable fixes.

Exploitation context

CISA KEV is false in the provided bundle. The sources do not claim active exploitation, public exploit availability, or remote exploitation. The described condition is a kernel memory leak tied to removal/error paths.

Researcher notes

Evidence is concise but incomplete: the root cause and fix direction are clear, while CVSS, CWE, exploitability, and affected downstream package details are not supplied. Avoid assuming impact beyond the documented memory leak.

Mitigation direction

  • Update to a vendor kernel containing the relevant stable fix.
  • Check Linux distribution and product advisories for backported packages.
  • Prioritize systems using Xen SCSI backend functionality.
  • Consult Siemens SSA-019113 if Siemens products are in scope.
  • Monitor affected hosts for abnormal kernel memory growth.

Validation and detection

  • Inventory Linux kernel versions across Xen virtualization hosts.
  • Confirm whether xen scsiback is present, enabled, or packaged.
  • Map installed kernels to vendor advisories or stable commit backports.
  • Verify patched kernels after maintenance windows.
  • Regression test normal Xen SCSI device lifecycle operations.
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

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-2026-23087 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
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.

ADP provider summaries

siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988, d9d660f6e562a47b4065eeb7e538910b0471b988unaffected
LinuxLinux3.18, 0, 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19affected
Weakness

CWE details

No CWE listed

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