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

Status: published. Published: 2026-08-15. Updated: 2026-11-06.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < df65d9fea8437235e740552e542fb309765507db (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 5daa63404b708fc74e94da8398affbb148d09044 (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 523caef03124ecc08ce62a78c617759c2d28cf1c (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < f2ff634d95f8a6c885b9ce71a64067e255bcc34a (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 6773d6d82bdabddab2b31605d6d7029c91dbd217 (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 6596baf8041100a9d1647beb5ea8ea4496ce058f (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 11f68ebc6891d11de5f32b7dee918c5dc18b8de1 (affected, git); ≥ 548c4940b9f1f527f81509468dd60b61418880b6; < 1bd6676254b4ab6acd44b662b5e92822c036463a (affected, git). Source: CNA: Linux
- Linux / Linux: 5.6 (affected); ≥ 0; < 5.6 (unaffected, semver); ≥ 5.10.261; ≤ 5.10.* (unaffected, semver); ≥ 5.15.212; ≤ 5.15.* (unaffected, semver); ≥ 6.1.178; ≤ 6.1.* (unaffected, semver); ≥ 6.6.145; ≤ 6.6.* (unaffected, semver); ≥ 6.12.97; ≤ 6.12.* (unaffected, semver); ≥ 6.18.40; ≤ 6.18.* (unaffected, semver); ≥ 7.1.5; ≤ 7.1.* (unaffected, semver); ≥ 7.2; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.22% as of 2026-11-06; percentile 12.55%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/df65d9fea8437235e740552e542fb309765507db (CNA: Linux)

- https://git.kernel.org/stable/c/5daa63404b708fc74e94da8398affbb148d09044 (CNA: Linux)

- https://git.kernel.org/stable/c/523caef03124ecc08ce62a78c617759c2d28cf1c (CNA: Linux)

- https://git.kernel.org/stable/c/f2ff634d95f8a6c885b9ce71a64067e255bcc34a (CNA: Linux)

- https://git.kernel.org/stable/c/6773d6d82bdabddab2b31605d6d7029c91dbd217 (CNA: Linux)

- https://git.kernel.org/stable/c/6596baf8041100a9d1647beb5ea8ea4496ce058f (CNA: Linux)

- https://git.kernel.org/stable/c/11f68ebc6891d11de5f32b7dee918c5dc18b8de1 (CNA: Linux)

- https://git.kernel.org/stable/c/1bd6676254b4ab6acd44b662b5e92822c036463a (CNA: Linux)

- https://git.kernel.org/stable/c/11f68ebc6891d11de5f32b7dee918c5dc18b8de1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/1bd6676254b4ab6acd44b662b5e92822c036463a (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/523caef03124ecc08ce62a78c617759c2d28cf1c (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/5daa63404b708fc74e94da8398affbb148d09044 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/6596baf8041100a9d1647beb5ea8ea4496ce058f (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/6773d6d82bdabddab2b31605d6d7029c91dbd217 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/df65d9fea8437235e740552e542fb309765507db (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

- https://git.kernel.org/stable/c/f2ff634d95f8a6c885b9ce71a64067e255bcc34a (416baaa9-dc9f-4396-8d5f-8c081fb06d67)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-72056; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72056; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-72056; retrieved 2026-11-06; source updated Not reported

Revision: 0a819a27d1488bcc95deb5353ce95a7c8e52dfc52d6233f97f0884b33ed6718a

Canonical: https://y2.dev/cve/CVE-2026-72056

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