CVE-2025-37790

Kernel service interruption via MCTP socket race

Published May 1, 2025 · Updated Aug 5, 2026

Use-after-free in MCTP socket lookup allows local users to interrupt Linux kernel operation by racing bind lookup with socket release. Bind lookup runs under RCU, but affected code can free an MCTP socket before lookup finishes, leaving the lookup with a stale pointer. NVD assesses local low-privileged access as the gate; the public record does not state whether the interruption is a crash or hang.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in MCTP socket lookup allows local users to interrupt Linux kernel operation by racing bind lookup with socket release. Bind lookup runs under RCU, but affected code can free an MCTP socket before lookup finishes, leaving the lookup with a stale pointer. NVD assesses local low-privileged access as the gate; the public record does not state whether the interruption is a crash or hang.

The record

CVE
CVE-2025-37790
Published
May 1, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. May 1, 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=5.15
  2. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <3f899bd6dd56ddc46509b526e23a8f0a97712a6d
  3. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <52024cd6ec71a6ca934d0cc12452bd8d49850679
  4. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <5c1313b93c8c2e3904a48aa88e2fa1db28c607ae
  5. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <a8a3b61ce140e2b0a72a779e8d70f60c0cf1e47a
  6. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <b9764ebebb007249fb733a131b6110ff333b6616
  7. Affected versionversion=833ef3b91de692ef33b800bca6b1569c39dece74 <e3b5edbdb45924a7d4206d13868a2aac71f1e53d

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=833ef3b91de692ef33b800bca6b1569c39dece74 <3f899bd6dd56ddc46509b526e23a8f0a97712a6d; version=833ef3b91de692ef33b800bca6b1569c39dece74 <52024cd6ec71a6ca934d0cc12452bd8d49850679; version=833ef3b91de692ef33b800bca6b1569c39dece74 <5c1313b93c8c2e3904a48aa88e2fa1db28c607ae; version=833ef3b91de692ef33b800bca6b1569c39dece74 <a8a3b61ce140e2b0a72a779e8d70f60c0cf1e47a; version=833ef3b91de692ef33b800bca6b1569c39dece74 <b9764ebebb007249fb733a131b6110ff333b6616; version=833ef3b91de692ef33b800bca6b1569c39dece74 <e3b5edbdb45924a7d4206d13868a2aac71f1e53d

Published CVSS scores

8.8Linux kernel CVE teamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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