ext4: don't zero the entire extent if EXT4_EXT_DATA_PARTIAL_VALID1
CVE-2026-45858 is a vulnerability related to the ext4 filesystem handling in Microsoft and Azure Linux 3. 0 environments. The issue involves improper zeroing behavior of extents when the EXT4_EXT_DATA_PARTIAL_VALID1 flag is set. No detailed technical exploitation or impact information is provided. There is no CVSS score or known exploits in the wild reported. Patch or remediation status is not confirmed from the available data.
AI Analysis
Technical Summary
This vulnerability concerns the ext4 filesystem implementation in Microsoft and Azure Linux 3.0, specifically the handling of extents when the EXT4_EXT_DATA_PARTIAL_VALID1 flag is set. The flaw is that the entire extent is not zeroed as expected, which may lead to inconsistent filesystem state or data integrity issues. No further technical details or exploitation methods are described in the provided information.
Potential Impact
The impact details are not explicitly described in the source data. Given the nature of the vulnerability, potential impacts could involve filesystem data integrity or stability issues. However, no confirmed exploitation or specific impact scenarios are documented.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
ext4: don't zero the entire extent if EXT4_EXT_DATA_PARTIAL_VALID1
Description
CVE-2026-45858 is a vulnerability related to the ext4 filesystem handling in Microsoft and Azure Linux 3. 0 environments. The issue involves improper zeroing behavior of extents when the EXT4_EXT_DATA_PARTIAL_VALID1 flag is set. No detailed technical exploitation or impact information is provided. There is no CVSS score or known exploits in the wild reported. Patch or remediation status is not confirmed from the available data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns the ext4 filesystem implementation in Microsoft and Azure Linux 3.0, specifically the handling of extents when the EXT4_EXT_DATA_PARTIAL_VALID1 flag is set. The flaw is that the entire extent is not zeroed as expected, which may lead to inconsistent filesystem state or data integrity issues. No further technical details or exploitation methods are described in the provided information.
Potential Impact
The impact details are not explicitly described in the source data. Given the nature of the vulnerability, potential impacts could involve filesystem data integrity or stability issues. However, no confirmed exploitation or specific impact scenarios are documented.
Mitigation Recommendations
Patch status is not yet confirmed — check the Microsoft Security Response Center advisory for current remediation guidance. No official fix or workaround information is provided in the available data.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-45858
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a18ab7be29bf47b50288d73
Added to database: 5/28/2026, 8:54:19 PM
Last enriched: 5/28/2026, 9:03:34 PM
Last updated: 5/29/2026, 6:27:38 AM
Views: 3
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