tun: free page on short-frame rejection in tun_xdp_one()
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
AI Analysis
Technical Summary
This vulnerability involves a memory management issue in the tun_xdp_one() function of the Linux kernel used in Microsoft Azure Linux 3.0. The issue occurs when a short frame is rejected, leading to a free page operation that may cause unintended behavior or instability. The exact impact and exploitation details are not provided. The vulnerability is identified by Microsoft Security Response Center under advisory msrc_CVE-2026-46321.
Potential Impact
The impact details are not explicitly described in the available information. Given the nature of the vulnerability (freeing a page on short-frame rejection), potential impacts could include memory corruption or denial of service, but these are not confirmed by the vendor or advisory. No known exploits are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
tun: free page on short-frame rejection in tun_xdp_one()
Description
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a memory management issue in the tun_xdp_one() function of the Linux kernel used in Microsoft Azure Linux 3.0. The issue occurs when a short frame is rejected, leading to a free page operation that may cause unintended behavior or instability. The exact impact and exploitation details are not provided. The vulnerability is identified by Microsoft Security Response Center under advisory msrc_CVE-2026-46321.
Potential Impact
The impact details are not explicitly described in the available information. Given the nature of the vulnerability (freeing a page on short-frame rejection), potential impacts could include memory corruption or denial of service, but these are not confirmed by the vendor or advisory. No known exploits are reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround information is provided at this time.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-46321
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a294d9c8dd33fbd853b00e2
Added to database: 06/10/2026, 11:42:20 UTC
Last enriched: 06/26/2026, 16:23:05 UTC
Last updated: 07/31/2026, 19:24:47 UTC
Views: 31
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.