CVE-2026-46012

Memory exhaustion via RxRPC credential leaks

Published May 27, 2026 · Updated May 27, 2026

Memory leaks in affected Linux Kernel releases allow local users to exhaust memory during RxRPC rxkad response verification. The rxkad_verify_response() error paths return after allocating a ticket or retaining the server key without releasing those objects. A low-privileged local user must repeatedly reach the authentication-response paths; the accumulating kernel objects exhaust memory and interrupt service.

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

Memory leaks in affected Linux Kernel releases allow local users to exhaust memory during RxRPC rxkad response verification. The rxkad_verify_response() error paths return after allocating a ticket or retaining the server key without releasing those objects. A low-privileged local user must repeatedly reach the authentication-response paths; the accumulating kernel objects exhaust memory and interrupt service.

The record

CVE
CVE-2026-46012
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=5.11
  2. Affected versionversion=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <34f61a07e0cdefaecd3ec03bb5fb22215643678f
  3. Affected versionversion=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <852b9d64cea421336579b2de3d1338dfa677e2dd
  4. Affected versionversion=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <861b9a0a1823bf064a7b810d29502a9ef043f40f
  5. Affected versionversion=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <c4b8f32e73eafd4a5076be890c7c8506ec04567c
  6. Affected versionversion=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <c91f33fb8356dedc82bc56ce210f1a5dbee62a52

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.11; version=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <34f61a07e0cdefaecd3ec03bb5fb22215643678f; version=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <852b9d64cea421336579b2de3d1338dfa677e2dd; version=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <861b9a0a1823bf064a7b810d29502a9ef043f40f; version=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <c4b8f32e73eafd4a5076be890c7c8506ec04567c; version=ec832bd06d6fdf08b0455ab7c2a7a9104e029638 <c91f33fb8356dedc82bc56ce210f1a5dbee62a52

Published CVSS scores

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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