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Linux EUVDEUVD-2026-93170

| CVE-2026-98242
2026-10-06 Linux GHSA-vfw6-gcwv-53h6
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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:

dma-buf: Fix silent overflow for phys vec to sgt

In case MMIO size is bigger than 4G and peer2peer DMA goes through host bridge, we trigger a code path that assigns the total linked IOVA (which is greater than 4G) to mapped_len.

Previously, mapped_len was declared as 32-bit unsigned int. When accumulating size_t lengths, this leads to a silent wrap-around. This truncation causes truncated lengths to be passed to functions like fill_sg_entry().

Fix this by changing mapped_len to size_t (64-bit). While at it, fix similar potential overflow issues in calc_sg_nents by using check_add_overflow() for nents and using unsigned int for the loop iterator in fill_sg_entry to match.

Affected VersionsENISA

Linux patch: 7.3-rc4
Linux 3aa31a8bb11e47c0ff2b306988d1756b810c1c3c <6b98fd7106d4e486f432664893dcd4d6fa3a9693
Linux 3aa31a8bb11e47c0ff2b306988d1756b810c1c3c <b344ca94e8cc85796f16ea25e2e5a8e0303fe813
Linux patch: 0
Linux 6.19
Linux patch: 7.2.8

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Lifecycle Timeline

2
Patch available
Oct 06, 2026 - 10:02 EUVD
CVE Published
Oct 06, 2026 - 08:45 cve.org
UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Data Quality
1 sources
Confidence: Low

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

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

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