CVE-2025-38190

Local service interruption via leaked socket accounting

Published Jul 4, 2025 · Updated May 11, 2026

Resource leakage in the Linux kernel ATM subsystem allows local users to interrupt service by exhausting socket write-memory accounting. The vcc_sendmsg() failure path charges skb->truesize through atm_account_tx() but does not reverse the charge when copy_from_iter_full() fails, leaving sk_wmem_alloc inflated. Low-privileged local access and an ATM socket are required; repeated failures can exhaust socket resources without disclosing or modifying data.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource leakage in the Linux kernel ATM subsystem allows local users to interrupt service by exhausting socket write-memory accounting. The vcc_sendmsg() failure path charges skb->truesize through atm_account_tx() but does not reverse the charge when copy_from_iter_full() fails, leaving sk_wmem_alloc inflated. Low-privileged local access and an ATM socket are required; repeated failures can exhaust socket resources without disclosing or modifying data.

The record

CVE
CVE-2025-38190
Published
Jul 4, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 4, 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

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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2252c539c43f9a1431a7e8b34e3c18e9dd77a96d
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <287b4f085d2ca3375cf1ee672af27410c64777e8
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3902205eadf35db59dbc2186c2a98b9e6182efa5
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d828519bd69bfcaabdd942a872679617ef06739
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e0d00992118e234ebf29d5145c1cc920342777e
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7851263998d4269125fd6cb3fdbfc7c6db853859
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c12430edd92fd49a4800b0f3fb395b50cb16bcc1
  9. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2252c539c43f9a1431a7e8b34e3c18e9dd77a96d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <287b4f085d2ca3375cf1ee672af27410c64777e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3902205eadf35db59dbc2186c2a98b9e6182efa5; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3d828519bd69bfcaabdd942a872679617ef06739; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e0d00992118e234ebf29d5145c1cc920342777e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7851263998d4269125fd6cb3fdbfc7c6db853859; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7d6bc28cfe5c8e3a279b4b4bdeed6698b2702685; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c12430edd92fd49a4800b0f3fb395b50cb16bcc1; version=2.6.12

Published CVSS scores

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo