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CVE Record

CVE-2019-25160: netlabel: fix out-of-bounds memory accesses

In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel memory safety flaw in NetLabel handling. The public record says two simple array out-of-bounds reads or writes were fixed. Business urgency depends on whether affected kernels and NetLabel/CIPSO features are present; the source bundle gives no CVSS score, impact detail, or evidence of active exploitation.

Executive priority

Track and remediate through normal Linux kernel patch management unless local exposure to NetLabel/CIPSO is confirmed. Escalate priority for security-sensitive hosts using labeled networking or older long-term kernels.

Technical view

The resolved kernel issue fixes two array out-of-bounds memory accesses: one in cipso_v4_map_lvl_valid() and one in netlbl_bitmap_walk(). Backports before Linux 4.8 require applying the bitmap fix to cipso_v4_bitmap_walk() because netlbl_bitmap_walk() did not exist yet.

Likely exposure

Likely exposure is Linux systems running affected kernel versions or downstream packages containing the vulnerable NetLabel/CIPSO code. The provided data does not identify specific distributions, configurations required for reachability, or whether default installations are exposed.

Exploitation context

The source bundle does not report active exploitation, and KEV is false. It also does not provide exploitability prerequisites, attacker position, required privileges, or impact class. Treat exploitation context as incomplete until vendor advisories or kernel maintainers provide more detail.

Researcher notes

Evidence is limited to the CVE record and kernel stable references. No CVSS, CWE, exploit status, attack vector, or distribution package mapping is provided. The most useful next research step is correlating stable commits with affected downstream kernel builds.

Mitigation direction

  • Apply vendor kernel updates containing the upstream NetLabel fixes.
  • Map upstream stable commits to your distribution kernel package versions.
  • Prioritize systems using SELinux, labeled networking, CIPSO, or NetLabel-related configurations.
  • If patching is blocked, request vendor guidance; no workaround is provided in the sources.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, containers hosts, and embedded systems.
  • Check whether installed kernel packages include the referenced stable commits.
  • Review host configurations for NetLabel, CIPSO, or labeled networking use.
  • Confirm remediation through vendor package metadata or kernel changelogs.
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.

ATT&CK lookup starting points

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CVE-2019-25160 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
2ADP providers
9Source 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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, 446fda4f26822b2d42ab3396aafcedf38a9ff2b6unaffected
LinuxLinux2.6.19, 0, 3.16.66, 3.18.137, 4.4.177, 4.9.163, 4.14.106, 4.19.28, 4.20.15, 5.0affected
Weakness

CWE details

No CWE listed

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