VulnerabilityPublished 15 Aug 2026Updated 6 Nov 2026

CVE-2026-72056: Linux kernel · net: ena: clean up XDP TX queues when regular TX setup fails

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f2ff634d95f8a6c885b9ce71a64067e255bcc34a : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:19 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in f2ff634d95f8a6c885b9ce71a64067e255bcc34a, df65d9fea8437235e740552e542fb309765507db, 6773d6d82bdabddab2b31605d6d7029c91dbd217 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < f2ff634d95f8a6c885b9ce71a64067e255bcc34a	Fixed in f2ff634d95f8a6c885b9ce71a64067e255bcc34a
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < df65d9fea8437235e740552e542fb309765507db	Fixed in df65d9fea8437235e740552e542fb309765507db
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < 6773d6d82bdabddab2b31605d6d7029c91dbd217	Fixed in 6773d6d82bdabddab2b31605d6d7029c91dbd217
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < 6596baf8041100a9d1647beb5ea8ea4496ce058f	Fixed in 6596baf8041100a9d1647beb5ea8ea4496ce058f
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < 523caef03124ecc08ce62a78c617759c2d28cf1c	Fixed in 523caef03124ecc08ce62a78c617759c2d28cf1c
LinuxLinux	Affected ≥ 548c4940b9f1f527f81509468dd60b61418880b6, < 11f68ebc6891d11de5f32b7dee918c5dc18b8de1	Fixed in 11f68ebc6891d11de5f32b7dee918c5dc18b8de1

Description

In the Linux kernel, the following vulnerability has been resolved: net: ena: clean up XDP TX queues when regular TX setup fails create_queues_with_size_backoff() creates XDP TX queues before setting up the regular TX path. If the subsequent allocation or creation of regular TX queues fails, the error handling paths omit the teardown of the XDP TX queues, leading to a resource leak. Fix this by explicitly destroying the XDP TX queue subset at the two missing failure points. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc7. An x86_64 allyesconfig build showed no new warnings. As we do not have an ENA device to test with, no runtime testing was able to be performed.

References

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