CVE-2026-53229Network attack vector

Service interruption via XDP transmit resource leak

Published Jun 25, 2026 · Updated Jun 25, 2026

Resource leak in the mlx5e XSK transmit path in Linux Kernel allows attackers to interrupt service when XDP_TX transmission fails. The mlx5e_xmit_xdp_buff() failure path returns without unmapping the DMA address or releasing the xdp_frame, and no FIFO entry remains for completion cleanup. Exposure requires the mlx5e XSK zero-copy path and a failed xmit_xdp_frame() call, such as a full XDPSQ; repeated failures strand DMA mappings and frames.

CVSS severity7.5
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the mlx5e XSK transmit path in Linux Kernel allows attackers to interrupt service when XDP_TX transmission fails. The mlx5e_xmit_xdp_buff() failure path returns without unmapping the DMA address or releasing the xdp_frame, and no FIFO entry remains for completion cleanup. Exposure requires the mlx5e XSK zero-copy path and a failed xmit_xdp_frame() call, such as a full XDPSQ; repeated failures strand DMA mappings and frames.

The record

CVE
CVE-2026-53229
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=5.3
  2. Affected versionversion=84a0a2310d6de247335574649726cb000c7c0074 <0aabca726b43d833721034e97d99efcc8237b22a
  3. Affected versionversion=84a0a2310d6de247335574649726cb000c7c0074 <2789b74ae1f4b68333c9d5eec2f3354d07b16e61
  4. Affected versionversion=84a0a2310d6de247335574649726cb000c7c0074 <7b3eeba50fbc3b45f279037c29a87a90e8bac1e1
  5. Affected versionversion=84a0a2310d6de247335574649726cb000c7c0074 <b69004f5a6ad32da84d8aa5b23b9c0caafe6252e

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.3; version=84a0a2310d6de247335574649726cb000c7c0074 <0aabca726b43d833721034e97d99efcc8237b22a; version=84a0a2310d6de247335574649726cb000c7c0074 <2789b74ae1f4b68333c9d5eec2f3354d07b16e61; version=84a0a2310d6de247335574649726cb000c7c0074 <7b3eeba50fbc3b45f279037c29a87a90e8bac1e1; version=84a0a2310d6de247335574649726cb000c7c0074 <b69004f5a6ad32da84d8aa5b23b9c0caafe6252e

Published CVSS scores

7.5kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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