CVE-2026-68473

Local memory compromise via incorrect address masking

Published Aug 15, 2026 · Updated Aug 15, 2026

Linux kernel 7.0 on PowerPC E500 allows local users to read or modify memory and crash the host via crafted syscall pointers. mask_user_address() tests CONFIG_E500 instead of CONFIG_PPC_E500, selecting simple masking rather than mask_user_address_isel() and redirecting bit-31-set pointers to address 0x80000000. Exploitation requires an unprivileged local process on affected E500 hardware; misdirected uaccess and futex operations can disclose or corrupt memory or panic the kernel.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux kernel 7.0 on PowerPC E500 allows local users to read or modify memory and crash the host via crafted syscall pointers. mask_user_address() tests CONFIG_E500 instead of CONFIG_PPC_E500, selecting simple masking rather than mask_user_address_isel() and redirecting bit-31-set pointers to address 0x80000000. Exploitation requires an unprivileged local process on affected E500 hardware; misdirected uaccess and futex operations can disclose or corrupt memory or panic the kernel.

The record

CVE
CVE-2026-68473
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-1025, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=7.0
  2. Affected versionversion=861574d51bbd7a06dbf07f658a9a8def012c2f74 <d5c234774a82f27b594f70c15fc45ce3648e4295
  3. Affected versionversion=861574d51bbd7a06dbf07f658a9a8def012c2f74 <d610d3ab18197d87618da11ec5fe8b3cebf32208

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=7.0; version=861574d51bbd7a06dbf07f658a9a8def012c2f74 <d5c234774a82f27b594f70c15fc45ce3648e4295; version=861574d51bbd7a06dbf07f658a9a8def012c2f74 <d610d3ab18197d87618da11ec5fe8b3cebf32208

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8LinuxCVSS: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-1025Comparison Using Wrong Factors
T1068Exploitation for Privilege Escalation

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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