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An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged use…

High CVSS 7.8
CVECVE-2021-27365
First seen2026-07-30 20:30 UTC
Disclosed2021-03-07 05:15 UTC
Last updated2026-07-30 20:30 UTC
Channel statusauto

Summary

An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. An unprivileged user can send a Netlink message that is associated with iSCSI, and has a length up to the maximum length of a Netlink message.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

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Lint boundary warnings (4)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD