Is there a patch available for EUVD-2026-103780?

Yes, a patch is available for EUVD-2026-103780. Update the affected software to the latest version immediately.

Linux EUVD-2026-103780

| CVE-2026-98840

2026-10-18 Linux

GHSA-vpw3-5qwq-wxvw

Information Disclosure Linux

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Monitor Track and reassess. 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:

vc_screen: reload vc pointer before if (ret) in vcs_write() to avoid UAF

The reload of 'vc' added by commit 8fb9ea65c9d1 ("vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF") sits after the 'if (ret)' block, so the copy-failure break path exits the loop without reloading vc. If the vc was kfree()'d via vc_port_destruct during the unlocked copy_from_user() window, the post-loop 'if (written && vc) vcs_scr_updated(vc)' is reached with a stale non-NULL vc. The '&& vc' guard from commit a287620312dc ("vc_screen: fix null-ptr-deref in vcs_notifier() during concurrent vcs_write") only handles the NULL case, not this stale-non-NULL case; vcs_notifier() then reads param->vc->vc_num from freed memory:

BUG: KASAN: slab-use-after-free in vcs_notifier+0x7c/0xd0 Read of size 2 at addr ffff888007149190 Call Trace: vcs_notifier+0x7c/0xd0 atomic_notifier_call_chain+0x70/0xa0 vcs_scr_updated+0x77/0xa0 vcs_write+0x71b/0x7e0 Allocated by task: vc_allocate -> con_install -> tty_open Freed by task: kfree <- vt_ioctl (VT_DISALLOCATE -> vc_port_destruct)

Move the reload to immediately after console_lock(), before 'if (ret)', so every break path below passes a fresh vc to the post-loop vcs_scr_updated().

Affected VersionsENISA

Linux patch: 6.12.113

Linux patch: 6.18.56

Linux patch: 7.2.10

Linux 5.15.211 <5.16

Linux 7cc3dd79777f6ae4625ec37e84dd18a26dc88bde <233a2e190b12884d186027d0b86d43a48799b69c

Linux 7.0.14 <7.1

Linux patch: 0

Linux 6.12.95 <6.12.113

Linux ff4806202749a51938236214adc0281481a57366

Linux 43a6281790273c1b0a9ab76609ff0245b968f1e6

Linux 6.18.37 <6.18.56

Linux 09a43e81279b8da15526da09877134b8bcf618b0

Linux 7.2

Linux b6bbb85cf45bf0b070e741997fe0af3a772c5ad5

Linux 74be188eb2dc1c99d63986167b9a67d415fe7326

Linux 8232fca738011ca2ec865b46ec721d1796dc0580

Linux 6.1.177 <6.2

Linux 73049768ad57145acd337102c5aa3c788e6642c8 <1485a3dd97ab1af2605243cabe6b604546d46dd1

Linux a287620312dc6dcb9a093417a0e589bf30fcf38a <226bd5603371cd9f6642cbb9e9a677f445de3530

Linux a287620312dc6dcb9a093417a0e589bf30fcf38a <9dfcadc5e003fb250dd471db90144bd5366140e9

Linux 7.1.2 <7.2

Linux patch: 7.3-rc6

Linux 6.6.144 <6.7

Linux 5.10.260 <5.11

Affected Packages

euvd linux fix: 5.11, 5.16, 6.2, 6.7, 6.12.113, 6.18.56, 7.1, 7.2

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 18, 2026 - 17:19 EUVD

CVE Published

Oct 18, 2026 - 15:50 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 94% exploitable

Data Quality

3 sources

Confidence: Low

EUVD

CVE.org

EPSS MSRC

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.