CVE-2026-46068

Service interruption via nx842 bounce-buffer page leak

Published May 27, 2026 · Updated May 27, 2026

Memory leak in affected Linux Kernel releases allows local users to exhaust kernel memory through repeated nx842 context allocation. The nx842 allocation and error-cleanup paths obtain four-page bounce buffers with __get_free_pages() but return only one page with free_page(). Reachability requires the nx842 compressor and repeated context creation or teardown; the published record identifies no remote path.

CVSS severity7.8
High
EPSS probability0.13%
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 affected Linux Kernel releases allows local users to exhaust kernel memory through repeated nx842 context allocation. The nx842 allocation and error-cleanup paths obtain four-page bounce buffers with __get_free_pages() but return only one page with free_page(). Reachability requires the nx842 compressor and repeated context creation or teardown; the published record identifies no remote path.

The record

CVE
CVE-2026-46068
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, T1499.004
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=4.2
  2. Affected versionversion=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <5c07962fed66e1238fad7635fa150570bd38b4c5
  3. Affected versionversion=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <80fd99d7c30ea889662d21f1b44d8fea4c83138d
  4. Affected versionversion=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <910bb34b801d39794e656f7d48414844b2bd354e
  5. Affected versionversion=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <adb3faf2db1a66d0f015b44ac909a32dfc7f2f9c
  6. Affected versionversion=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <f17a4850d1ce7c11cba8b1830b9bfedfede878bb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.2; version=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <5c07962fed66e1238fad7635fa150570bd38b4c5; version=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <80fd99d7c30ea889662d21f1b44d8fea4c83138d; version=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <910bb34b801d39794e656f7d48414844b2bd354e; version=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <adb3faf2db1a66d0f015b44ac909a32dfc7f2f9c; version=ed70b479c2c0b6e1319f0cb2de19f1051be219a4 <f17a4850d1ce7c11cba8b1830b9bfedfede878bb

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/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.

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-787Out-of-bounds Write
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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