net/sched: cls_route: fix fastmap use-after-free on filter
CVE-2026-74583 is a use-after-free vulnerability in the cls_route component of the net/sched subsystem in Microsoft software version 3.0. The issue involves improper handling of fastmap usage on a filter, which could lead to memory corruption. No CVSS score or detailed impact information is provided. There are no known exploits in the wild, and no patch or remediation details are currently available.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-74583, affects Microsoft software version 3.0 and involves a use-after-free condition in the cls_route module of the net/sched subsystem. The flaw arises from incorrect management of fastmap usage on a filter, potentially leading to memory corruption or instability. The Microsoft Security Response Center has published this advisory, but no patch or exploit information is currently provided.
Potential Impact
The vulnerability could allow memory corruption due to use-after-free in the cls_route fastmap filter handling. However, no known exploits are reported, and the specific impact on confidentiality, integrity, or availability is not detailed in the available information.
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 currently provided.
net/sched: cls_route: fix fastmap use-after-free on filter
Description
CVE-2026-74583 is a use-after-free vulnerability in the cls_route component of the net/sched subsystem in Microsoft software version 3.0. The issue involves improper handling of fastmap usage on a filter, which could lead to memory corruption. No CVSS score or detailed impact information is provided. There are no known exploits in the wild, and no patch or remediation details are currently available.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-74583, affects Microsoft software version 3.0 and involves a use-after-free condition in the cls_route module of the net/sched subsystem. The flaw arises from incorrect management of fastmap usage on a filter, potentially leading to memory corruption or instability. The Microsoft Security Response Center has published this advisory, but no patch or exploit information is currently provided.
Potential Impact
The vulnerability could allow memory corruption due to use-after-free in the cls_route fastmap filter handling. However, no known exploits are reported, and the specific impact on confidentiality, integrity, or availability is not detailed in the available information.
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 currently provided.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-74583
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a8af9a4acd9273b49f32f4e
Added to database: 08/23/2026, 13:46:12 UTC
Last enriched: 08/23/2026, 13:51:01 UTC
Last updated: 08/24/2026, 00:12:27 UTC
Views: 10
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