CVE-2025-37894

Kernel crash via mismatched TIME_WAIT socket release

Published May 20, 2025 · Updated Aug 5, 2026

Denial of service in the Linux kernel allows local users to crash the system by reaching TCP_TIME_WAIT handling with crafted traffic. The IPv4 and IPv6 GRO paths can receive an inet_timewait_sock from a lookup but pass it to sock_put(), which treats it as a full sock and accesses invalid fields during release. Low-privileged local access is required, and the demonstrated consequence is a kernel panic rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to crash the system by reaching TCP_TIME_WAIT handling with crafted traffic. The IPv4 and IPv6 GRO paths can receive an inet_timewait_sock from a lookup but pass it to sock_put(), which treats it as a full sock and accesses invalid fields during release. Low-privileged local access is required, and the demonstrated consequence is a kernel panic rather than data disclosure or modification.

The record

CVE
CVE-2025-37894
Published
May 20, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <786650e644c5b1c063921799ca203c0b8670d79a
  3. Affected versionversion=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <c0dba059b118b5206e755042b15b49368a388898
  4. Affected versionversion=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <f920436a44295ca791ebb6dae3f4190142eec703

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.10; version=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <786650e644c5b1c063921799ca203c0b8670d79a; version=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <c0dba059b118b5206e755042b15b49368a388898; version=c9d1d23e5239f41700be69133a5769ac5ebc88a8 <f920436a44295ca791ebb6dae3f4190142eec703

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1499Endpoint Denial of Service

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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