CVE-2019-25160Network attack vector

Memory disclosure or crash via NetLabel bounds errors

Published Feb 26, 2024 · Updated Aug 5, 2026

Out-of-bounds reads in the Linux kernel NetLabel subsystem allow remote attackers to disclose kernel memory or crash affected systems. cipso_v4_map_lvl_valid indexes a level mapping without first checking its size, while netlbl_bitmap_walk advances beyond the supplied bitmap length. Exposure requires IPv4 CIPSO processing and a configured translation mapping; consequences are limited to disclosure or service interruption.

CVSS severity9.1
Critical
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds reads in the Linux kernel NetLabel subsystem allow remote attackers to disclose kernel memory or crash affected systems. cipso_v4_map_lvl_valid indexes a level mapping without first checking its size, while netlbl_bitmap_walk advances beyond the supplied bitmap length. Exposure requires IPv4 CIPSO processing and a configured translation mapping; consequences are limited to disclosure or service interruption.

The record

CVE
CVE-2019-25160
Published
Feb 26, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.19
  2. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000
  3. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <5578de4834fe0f2a34fedc7374be691443396d1f
  4. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <97bc3683c24999ee621d847c9348c75d2fe86272
  5. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <c61d01faa5550e06794dcf86125ccd325bfad950
  6. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <dc18101f95fa6e815f426316b8b9a5cee28a334e
  7. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <e3713abc4248aa6bcc11173d754c418b02a62cbb
  8. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <fbf9578919d6c91100ec63acf2cba641383f6c78
  9. Affected versionversion=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <fcfe700acdc1c72eab231300e82b962bac2b2b2c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.19; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <5578de4834fe0f2a34fedc7374be691443396d1f; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <97bc3683c24999ee621d847c9348c75d2fe86272; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <c61d01faa5550e06794dcf86125ccd325bfad950; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <dc18101f95fa6e815f426316b8b9a5cee28a334e; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <e3713abc4248aa6bcc11173d754c418b02a62cbb; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <fbf9578919d6c91100ec63acf2cba641383f6c78; version=446fda4f26822b2d42ab3396aafcedf38a9ff2b6 <fcfe700acdc1c72eab231300e82b962bac2b2b2c

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
9.1kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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