LiveActive security incident?Get immediate response
CVE Record

CVE-2011-5327: In the Linux kernel before 3.1, an off by one in the drivers/target/loopback/tcm_loop.c tcm_loop_make_naa_t...

In the Linux kernel before 3.1, an off by one in the drivers/target/loopback/tcm_loop.c tcm_loop_make_naa_tpg() function could result in at least memory corruption.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is an old Linux kernel bug, fixed before Linux 3.1, where a one-byte boundary error in target loopback code could corrupt memory. Business urgency is mainly for legacy or embedded systems still using very old kernels or vendor appliances with inherited kernel code.

Executive priority

Moderate attention for legacy estate risk, higher if critical appliances or unsupported kernels are still present. There is no provided evidence of active exploitation, but memory corruption in kernel code warrants cleanup of outdated systems.

Technical view

CVE-2011-5327 describes an off-by-one condition in drivers/target/loopback/tcm_loop.c, specifically tcm_loop_make_naa_tpg(), in Linux kernel versions before 3.1. The cited impact is at least memory corruption. The bundle provides no CVSS score, CWE, exploit details, or complete product impact matrix.

Likely exposure

Exposure is most likely limited to systems, appliances, or embedded platforms running Linux kernels before 3.1 or vendor backports containing the vulnerable code. The source bundle lists affected product data as n/a, so product-specific exposure must be confirmed with vendors.

Exploitation context

The provided sources do not show CISA KEV listing, active exploitation, public exploit maturity, or attacker requirements. Treat this as a legacy kernel memory-corruption issue requiring inventory validation, not as evidence of current mass exploitation.

Researcher notes

The record is sparse: no CVSS, no CWE, no detailed affected CPEs, and no exploit conditions. Anchor analysis to the upstream Linux commit, Linux 3.1 changelog, CVE record, and vendor advisories. Avoid assuming F5 product impact without reading K42315210.

Mitigation direction

  • Inventory Linux systems and appliances running kernels older than 3.1.
  • Apply vendor-supported kernel updates or backports containing the upstream fix.
  • Check F5 advisory K42315210 for F5-specific impact and remediation guidance.
  • Retire, isolate, or tightly monitor unsupported legacy kernel deployments.
  • Confirm remediation through vendor package metadata, not only upstream version strings.

Validation and detection

  • Identify kernel versions across servers, appliances, containers hosts, and embedded assets.
  • Check vendor advisories for whether shipped kernels include the vulnerable target loopback code.
  • Verify installed kernel packages include the fix for commit 12f09ccb4612734a53e47ed5302e0479c10a50f8.
  • Review exposure assumptions for systems using Linux target loopback or storage target functionality.
  • Document unsupported systems that cannot receive a vendor-backed fix.
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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2011-5327 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
6Source 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

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