Is there a patch available for EUVD-2026-108887?

Yes, a patch is available for EUVD-2026-108887. Update the affected software to the latest version immediately.

Linux EUVD-2026-108887

| CVE-2026-98923

2026-10-23 Linux

GHSA-q3vh-mmhj-mxhr

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Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

arm64: io: Reject non-user protection in ioremap_prot()

Mapping a stack-top page via /dev/mem with PROT_NONE and then reading that process's /proc/<pid>/cmdline triggers a spurious WARN in ioremap_prot() through generic_access_phys():

WARNING: ./arch/arm64/include/asm/io.h:275 at generic_access_phys Call trace: generic_access_phys+0x1c8/0x228 (P) __access_remote_vm+0x2b4/0x398 access_remote_vm+0x14/0x30 get_mm_cmdline+0xf8/0x2a0 proc_pid_cmdline_read+0x68/0x120

generic_access_phys() passes the protection derived from the user PTE to ioremap_prot(). On arm64, a PROT_NONE mapping is represented by a present-invalid PTE, so pte_present() still returns true and the protection reaches ioremap_prot().

A PROT_NONE mapping does not have PTE_USER, causing the existing WARN_ON_ONCE() in ioremap_prot() to fire even though this is a valid user mapping. Execute-only mappings have the same issue and must not be readable through this path either.

ioremap_prot() should therefore reject protection values without PTE_USER without warning. This makes the access fail cleanly for PROT_NONE and execute-only mappings while retaining the existing user-protection contract.

Affected VersionsENISA

Linux 64858b76ec67c5fc40fef8ec1841fecb78c1ebde <fddc90d4af4550af410f52d11bbf6b5f36443838

Linux 6.12.93 <6.12.112

Linux patch: 7.3

Linux d1ad8fe7f72d73e1617bac79f2ec7a3bedf47e2a

Linux 3d64dcc0799c2d6921ba027716b7be721eb19fa8 <b17aa4955e3a694c663ebe99626e4c76ca4f7cfb

Linux 6.19.7 <6.20

Linux patch: 6.12.112

Linux 6.6.143 <6.6.158

Linux patch: 0

Linux patch: 6.6.158

Linux 7.0

Linux eeecafce5afffb4da703666ebefbd4d6e2a5abf6 <0b04af3d88bb7fc69b2d92457890608860e42365

Linux 8f098037139b294050053123ab2bc0f819d08932 <bb756b11ad63832ebee58caf9e8f9381eaecff9f

Linux 6.18.17 <6.18.55

Linux patch: 6.18.55

Linux 8f098037139b294050053123ab2bc0f819d08932 <9b583795feb51f8d50203228d001760d1344ef01

Linux patch: 7.2.9

Affected Packages

euvd linux fix: 6.6.158, 6.12.112, 6.18.55, 6.20

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Oct 23, 2026 - 13:17 EUVD

CVE Published

Oct 23, 2026 - 12:03 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 89% exploitable

Data Quality

1 sources

Confidence: Low

EUVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.