CVE-2025-37820

Guest crash via unchecked XDP frame conversion

Published May 8, 2025 · Updated Aug 5, 2026

A NULL-pointer dereference in affected Linux kernel releases allows local users to crash a Xen guest through a xen-netfront XDP transmit path. In xennet_run_xdp(), the XDP_TX branch passes an unchecked NULL result from xdp_convert_buff_to_frame() to xennet_xdp_xmit(). The path requires a Xen guest using xen-netfront with an attached XDP program that returns XDP_TX; conversion failure can terminate kernel processing, while failed XDP redirects also leak retained page references.

CVSS severity5.5
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A NULL-pointer dereference in affected Linux kernel releases allows local users to crash a Xen guest through a xen-netfront XDP transmit path. In xennet_run_xdp(), the XDP_TX branch passes an unchecked NULL result from xdp_convert_buff_to_frame() to xennet_xdp_xmit(). The path requires a Xen guest using xen-netfront with an attached XDP program that returns XDP_TX; conversion failure can terminate kernel processing, while failed XDP redirects also leak retained page references.

The record

CVE
CVE-2025-37820
Published
May 8, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.9
  2. Affected versionversion=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <5b83d30c63f9964acb1bc63eb8e670b9e0d2c240
  3. Affected versionversion=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <cc3628dcd851ddd8d418bf0c897024b4621ddc92
  4. Affected versionversion=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa
  5. Affected versionversion=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <d6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9
  6. Affected versionversion=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <eefccd889df3b49d92e7349d94c4aa7e1ba19f6c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.9; version=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <5b83d30c63f9964acb1bc63eb8e670b9e0d2c240; version=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <cc3628dcd851ddd8d418bf0c897024b4621ddc92; version=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <cefd8a2e2de46209ce66e6d30c237eb59b6c5bfa; version=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <d6a9c4e6f9b3ec3ad98468c950ad214af8a2efb9; version=6c5aa6fc4defc2a0977a2c59e4710d50fa1e834c <eefccd889df3b49d92e7349d94c4aa7e1ba19f6c

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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-476NULL Pointer Dereference
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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