CVE-2026-72056

Service interruption via leaked XDP TX queues

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource exhaustion in the Linux kernel ENA driver allows local users to interrupt service through failed regular TX queue setup. The create_queues_with_size_backoff function creates XDP TX queues first, but two regular-TX failure paths return without destroying that subset. Reachability requires the ENA driver, active XDP transmit queues, and a later regular TX allocation or creation failure; retained queue resources can degrade availability.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel ENA driver allows local users to interrupt service through failed regular TX queue setup. The create_queues_with_size_backoff function creates XDP TX queues first, but two regular-TX failure paths return without destroying that subset. Reachability requires the ENA driver, active XDP transmit queues, and a later regular TX allocation or creation failure; retained queue resources can degrade availability.

The record

CVE
CVE-2026-72056
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-459, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <11f68ebc6891d11de5f32b7dee918c5dc18b8de1
  2. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <1bd6676254b4ab6acd44b662b5e92822c036463a
  3. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <523caef03124ecc08ce62a78c617759c2d28cf1c
  4. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <5daa63404b708fc74e94da8398affbb148d09044
  5. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <6596baf8041100a9d1647beb5ea8ea4496ce058f
  6. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <6773d6d82bdabddab2b31605d6d7029c91dbd217
  7. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <df65d9fea8437235e740552e542fb309765507db
  8. Affected versionversion=548c4940b9f1f527f81509468dd60b61418880b6 <f2ff634d95f8a6c885b9ce71a64067e255bcc34a
  9. Affected versionversion=5.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=548c4940b9f1f527f81509468dd60b61418880b6 <11f68ebc6891d11de5f32b7dee918c5dc18b8de1; version=548c4940b9f1f527f81509468dd60b61418880b6 <1bd6676254b4ab6acd44b662b5e92822c036463a; version=548c4940b9f1f527f81509468dd60b61418880b6 <523caef03124ecc08ce62a78c617759c2d28cf1c; version=548c4940b9f1f527f81509468dd60b61418880b6 <5daa63404b708fc74e94da8398affbb148d09044; version=548c4940b9f1f527f81509468dd60b61418880b6 <6596baf8041100a9d1647beb5ea8ea4496ce058f; version=548c4940b9f1f527f81509468dd60b61418880b6 <6773d6d82bdabddab2b31605d6d7029c91dbd217; version=548c4940b9f1f527f81509468dd60b61418880b6 <df65d9fea8437235e740552e542fb309765507db; version=548c4940b9f1f527f81509468dd60b61418880b6 <f2ff634d95f8a6c885b9ce71a64067e255bcc34a; version=5.6

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1499Endpoint Denial of Service

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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