CVE-2025-22059Network attack vector

Service interrupt via UDP receive-accounting overflow

Published Apr 16, 2025 · Updated Aug 5, 2026

Integer overflow in Linux kernel UDP receive accounting allows remote attackers to exhaust kernel memory through a UDP flood. The __udp_enqueue_schedule_skb() path adds skb->truesize to signed sk->sk_rmem_alloc after a signed comparison against an INT_MAX receive buffer, allowing the counter to wrap and bypass the drop condition. Exposure requires an open UDP socket using SO_RCVBUFFORCE or a system configured with net.core.rmem_max of at least 512 MB; sustained datagrams can consume memory and interrupt service.

CVSS severity7.5
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux kernel UDP receive accounting allows remote attackers to exhaust kernel memory through a UDP flood. The __udp_enqueue_schedule_skb() path adds skb->truesize to signed sk->sk_rmem_alloc after a signed comparison against an INT_MAX receive buffer, allowing the counter to wrap and bypass the drop condition. Exposure requires an open UDP socket using SO_RCVBUFFORCE or a system configured with net.core.rmem_max of at least 512 MB; sustained datagrams can consume memory and interrupt service.

The record

CVE
CVE-2025-22059
Published
Apr 16, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.10
  2. Affected versionversion=6a1f12dd85a8b24f871dfcf467378660af9c064d <1f529988efe9870db802cb79d01d8f473099b4d7
  3. Affected versionversion=6a1f12dd85a8b24f871dfcf467378660af9c064d <5a465a0da13ee9fbd7d3cd0b2893309b0fe4b7e3
  4. Affected versionversion=6a1f12dd85a8b24f871dfcf467378660af9c064d <7571aadd20289e9ea10ebfed0986f39ed8b3c16b
  5. Affected versionversion=6a1f12dd85a8b24f871dfcf467378660af9c064d <94d5ad7b41122be33ebc2a6830fe710cba1ecd75

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.10; version=6a1f12dd85a8b24f871dfcf467378660af9c064d <1f529988efe9870db802cb79d01d8f473099b4d7; version=6a1f12dd85a8b24f871dfcf467378660af9c064d <5a465a0da13ee9fbd7d3cd0b2893309b0fe4b7e3; version=6a1f12dd85a8b24f871dfcf467378660af9c064d <7571aadd20289e9ea10ebfed0986f39ed8b3c16b; version=6a1f12dd85a8b24f871dfcf467378660af9c064d <94d5ad7b41122be33ebc2a6830fe710cba1ecd75

Published CVSS scores

7.5LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499.004Endpoint Denial of Service: Application 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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