CVE-2026-23119Public exploit

Local denial of service via missing net pointer

Published Feb 14, 2026 · Updated Feb 14, 2026

Denial of service in affected Linux Kernel releases allows local users to interrupt the system through a crafted bare XDP socket buffer. The bonding flow-dissect path passes a null network-namespace pointer to __skb_flow_dissect when the buffer has neither a device nor a socket; the fix supplies dev_net(bond->dev). Local access with permission to invoke BPF program testing and reach the bonding XDP transmit path is required, and the demonstrated result is an availability-only kernel failure.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Linux Kernel releases allows local users to interrupt the system through a crafted bare XDP socket buffer. The bonding flow-dissect path passes a null network-namespace pointer to __skb_flow_dissect when the buffer has neither a device nor a socket; the fix supplies dev_net(bond->dev). Local access with permission to invoke BPF program testing and reach the bonding XDP transmit path is required, and the demonstrated result is an availability-only kernel failure.

The record

CVE
CVE-2026-23119
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=5.5
  2. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <0efee0b992f28bd5ee01c7a86ef6a307c42eb907
  3. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <3be945abdd228fd00f6afcf8d137002867a4651b
  4. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <5f9b329096596b7e53e07d041d7fca4cbe1be752
  5. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <8e53780732ee881394406f79da5263b81eb48f7e
  6. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <bc3c8d2493c6f4d2038844dc8b7ee93de050f7fa
  7. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <de97735a40a144974bf3896ee4cc0270db2e47db
  8. Affected versionversion=58deb77cc52da9360d20676e68dd215742cbe473 <f4faaa1297ecf3255a8591fff2633df05bd5ec84

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.5; version=58deb77cc52da9360d20676e68dd215742cbe473 <0efee0b992f28bd5ee01c7a86ef6a307c42eb907; version=58deb77cc52da9360d20676e68dd215742cbe473 <3be945abdd228fd00f6afcf8d137002867a4651b; version=58deb77cc52da9360d20676e68dd215742cbe473 <5f9b329096596b7e53e07d041d7fca4cbe1be752; version=58deb77cc52da9360d20676e68dd215742cbe473 <8e53780732ee881394406f79da5263b81eb48f7e; version=58deb77cc52da9360d20676e68dd215742cbe473 <bc3c8d2493c6f4d2038844dc8b7ee93de050f7fa; version=58deb77cc52da9360d20676e68dd215742cbe473 <de97735a40a144974bf3896ee4cc0270db2e47db; version=58deb77cc52da9360d20676e68dd215742cbe473 <f4faaa1297ecf3255a8591fff2633df05bd5ec84

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

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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