Immediate
Before a patch is released, reduce exposure immediately and only allow trusted sources to reach the affected service.
root@hackertop:~/vulnfeed/CVE-2026-43284#
CVE-2026-43284
MEDIUM
LPE
⚠ Unpatched · Zero-day◉ PoC 公开
Lifecycle 4/7
Linux Kernel up to 6.6.137/6.12.86/6.18.27/7.0.4 xfrm skb_splice_from_iter privilege escalation
LIFECYCLE
5.3
CVSS
Vulnerability Description
A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.6.137/6.12.86/6.18.27/7.0.4 (Operating System). This issue affects the function skb_splice_from_iter of the component xfrm. Upgrading to version 6.6.138, 6.12.87, 6.18.28 or 7.0.5 eliminates this vulnerability. Applying the patch 50ed1e7873100f77abad20fd31c51029bc49cd03/b54edf1e9a3fd3491bdcb82a21f8d21315271e0d/71a1d9d985d26716f74d21f18ee8cac821b06e97/52646cbd00e765a6db9c3afe9535f26218276034 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Root Cause Analysis
Impact: Impacted is confidentiality, integrity, and availability.
Countermeasure: Upgrading to version 6.6.138, 6.12.87, 6.18.28 or 7.0.5 eliminates this vulnerability. Applying the patch 50ed1e7873100f77abad20fd31c51029bc49cd03/b54edf1e9a3fd3491bdcb82a21f8d21315271e0d/71a1d9d985d26716f74d21f18ee8cac821b06e97/52646cbd00e765a6db9c3afe9535f26218276034 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Countermeasure: Upgrading to version 6.6.138, 6.12.87, 6.18.28 or 7.0.5 eliminates this vulnerability. Applying the patch 50ed1e7873100f77abad20fd31c51029bc49cd03/b54edf1e9a3fd3491bdcb82a21f8d21315271e0d/71a1d9d985d26716f74d21f18ee8cac821b06e97/52646cbd00e765a6db9c3afe9535f26218276034 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
Validation (PoC/EXP) - Looking for Contributors
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Mitigation Plan - Sorted by Priority
High
Enable extra access controls, WAF/ACL, or reverse-proxy rules for Kernel.
High
Use logs and IOCs to hunt through production traffic and confirm whether exploitation traces already exist.
Medium
Keep this issue on the watch list and follow vendor advisories, rollback notices, and new variants.
Vulnerability Lifecycle - Click each stage to inspect details
The issue has entered HackerTop VulnFeed and is now being tracked by the community.
The vulnerability has been synchronized into the platform and entered the visible triage flow.
Initial impact validation is complete based on current disclosure, technical details, and public intelligence.
A public proof path already exists for reference.
No in-the-wild exploitation has been confirmed yet, but monitoring should continue.
No vendor patch is available yet. Apply temporary mitigations first.
Reduce exposure, restrict access, and inspect logs until a permanent fix is available.
5.3
CVSS
Temp Score
5.3
MEDIUM
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Metric Details
Attack Vector
Attack Vector
Local
Attack Complexity
Attack Complexity
Low
Privileges Required
Privileges Required
Low
User Interaction
User Interaction
None
Confidentiality Impact
Confidentiality Impact
High
Integrity Impact
Integrity Impact
High
Availability Impact
Availability Impact
High
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CVE-2026-43284 · CVSS 5.3 · Active Threat
