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CVE Record

CVE-2024-27025: nbd: null check for nla_nest_start

In the Linux kernel, the following vulnerability has been resolved: nbd: null check for nla_nest_start nla_nest_start() may fail and return NULL. Insert a check and set errno based on other call sites within the same source code.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2024-27025 is a Linux kernel bug in the network block device code. A helper can fail and return NULL, and the kernel code did not check that result before continuing. The public sources confirm a fix, but they do not provide CVSS scoring or a clear business-impact statement.

Executive priority

Handle through normal kernel patch management unless local exposure is confirmed on critical systems. Escalate if nbd is used in production storage workflows or if vendors identify affected appliances. Current evidence does not support emergency response language.

Technical view

The issue is in Linux nbd handling around nla_nest_start(). If nesting setup fails, the function may return NULL. The resolved kernel change adds a NULL check and sets errno consistently with nearby call sites. Sources do not specify exploit prerequisites, privilege requirements, or confirmed impact beyond the missing failure check.

Likely exposure

Exposure is most relevant to Linux systems running affected kernel versions with the nbd subsystem present or used. The bundle lists affected Linux versions from 4.12 through pre-fixed stable lines and fixed stable commits. Distribution and appliance exposure should be confirmed through vendor advisories.

Exploitation context

The source bundle does not show CISA KEV inclusion and does not cite active exploitation. It also does not provide exploit availability, remote reachability, or weaponized details. Treat exploitation status as unconfirmed based on the provided evidence.

Researcher notes

The useful facts are narrow: Linux kernel nbd code, missing NULL check after nla_nest_start(), and stable fixes across multiple branches. The bundle lacks CVSS, CWE, privilege model, trigger path, and impact detail, so validation should focus on kernel lineage and vendor backports.

Mitigation direction

  • Update to a Linux kernel containing the referenced stable fixes.
  • Use distribution or vendor kernel packages when available.
  • Check Debian LTS and appliance vendor advisories for fixed builds.
  • If patching is delayed, consult vendor guidance for temporary controls.
  • Restrict administrative access to systems that configure or use nbd.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Check whether deployed kernels include one of the referenced stable commits.
  • Review distribution security advisories for backported fixes.
  • Identify systems using or loading the nbd subsystem.
  • Confirm vulnerability scanner findings against actual kernel package changelogs.
Prepared
Confidence
medium
Sources
12

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-2024-27025 mapping review

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

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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
3ADP providers
11Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23, 47d902b90a32a42a3d33aef3a02170fc6f70aa23unaffected
LinuxLinux4.12, 0, 5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23, 6.7.11, 6.8.2, 6.9affected
Weakness

CWE details

No CWE listed

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