CVE-2026-46030

Service interruption via unreleased device-tree references

Published May 27, 2026 · Updated May 27, 2026

Memory leak in the Linux Kernel versalnet EDAC driver allows local users to interrupt service through repeated device probes. The mc_probe() path stores the reference returned by of_parse_phandle() in r5_core_node but omits of_node_put() on every exit path, leaking memory each time it runs. Reachability requires local low-privilege access and an affected AMD Versal NET system using this EDAC driver; repeated probes 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 leak in the Linux Kernel versalnet EDAC driver allows local users to interrupt service through repeated device probes. The mc_probe() path stores the reference returned by of_parse_phandle() in r5_core_node but omits of_node_put() on every exit path, leaking memory each time it runs. Reachability requires local low-privilege access and an affected AMD Versal NET system using this EDAC driver; repeated probes exhaust memory and interrupt service.

The record

CVE
CVE-2026-46030
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.001
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

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=6.18
  2. Affected versionversion=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <17e136993b2b5111d1ee1c57bbd188ae0bb0e128
  3. Affected versionversion=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <5c709b376460ff322580c41600e31c02f7cc0307
  4. Affected versionversion=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <b6e61356ad24987be40bf25369d22dd8dd00a513

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.18; version=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <17e136993b2b5111d1ee1c57bbd188ae0bb0e128; version=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <5c709b376460ff322580c41600e31c02f7cc0307; version=d5fe2fec6c40dda03df8cc9b4a97de0b7e39f984 <b6e61356ad24987be40bf25369d22dd8dd00a513

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.001OS Exhaustion Flood

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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