CVE-2026-31632

Service interruption via leaked RxGK context references

Published Apr 24, 2026 · Updated Apr 24, 2026

Resource leak in the RxRPC subsystem of Linux Kernel allows local users to interrupt service by triggering RxGK response verification. The rxgk_verify_response() path creates an rxgk_context but exits without calling rxgk_put(), retaining each context reference. Low-privileged local access and reachable RxGK response handling are required; the record does not specify whether exhaustion causes a hang or crash.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in the RxRPC subsystem of Linux Kernel allows local users to interrupt service by triggering RxGK response verification. The rxgk_verify_response() path creates an rxgk_context but exits without calling rxgk_put(), retaining each context reference. Low-privileged local access and reachable RxGK response handling are required; the record does not specify whether exhaustion causes a hang or crash.

The record

CVE
CVE-2026-31632
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=6.16
  2. Affected versionversion=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <1bd3d01378c1f9ecd313d394b51c808c1f418615
  3. Affected versionversion=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <4b5e8365515f4409de7d3b92a439154ee4f90f6d
  4. Affected versionversion=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <7e1876caa8363056f58a21d3b31b82c2daf7e608

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <1bd3d01378c1f9ecd313d394b51c808c1f418615; version=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <4b5e8365515f4409de7d3b92a439154ee4f90f6d; version=9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a <7e1876caa8363056f58a21d3b31b82c2daf7e608

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/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 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-401Missing Release of Memory after Effective Lifetime
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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