CVE-2025-37955

Local service interruption via AF_XDP allocation leak

Published May 20, 2025 · Updated May 11, 2026

Memory leak in Linux 6.11 through 6.12.28, 6.13 through 6.14.6, and 6.15-rc1 through 6.15-rc5 allows local users to exhaust kernel memory. The virtnet_xsk_pool_enable() error path returns after a failed header DMA mapping without freeing the previously allocated rq->xsk_buffs array. Reaching the flaw requires low-privileged local access, a virtio-net device, and an AF_XDP zero-copy socket bind that fails during DMA setup.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux 6.11 through 6.12.28, 6.13 through 6.14.6, and 6.15-rc1 through 6.15-rc5 allows local users to exhaust kernel memory. The virtnet_xsk_pool_enable() error path returns after a failed header DMA mapping without freeing the previously allocated rq->xsk_buffs array. Reaching the flaw requires low-privileged local access, a virtio-net device, and an AF_XDP zero-copy socket bind that fails during DMA setup.

The record

CVE
CVE-2025-37955
Published
May 20, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.11
  2. Affected versionversion=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <4397684a292a71fbc1e815c3e283f7490ddce5ae
  3. Affected versionversion=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <94a6f6c204abb2b2dcd2ce287536cc924469cfb5
  4. Affected versionversion=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <ba6917810bb4a5a32661fa941717399052b3f0d9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <4397684a292a71fbc1e815c3e283f7490ddce5ae; version=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <94a6f6c204abb2b2dcd2ce287536cc924469cfb5; version=e9f3962441c0a4d6f16c656e6c8aa02a3ccdd568 <ba6917810bb4a5a32661fa941717399052b3f0d9

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 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.

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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