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Security Notice - Statement on Local Privilege Escalation Vulnerability "Dirty Frag" in Linux Kernel

  • SA No:huawei-sa-VoIIACiaHPP-6376e0c7
  • Initial Release Date:2026-05-08

Following the discovery of the local privilege escalation vulnerability "Dirty Frag" on Linux Kernel, described as a successor to Copy Fail (CVE-2026-31431), Huawei has launched an immediate investigation. Successful exploitation of this vulnerability may allow attackers to escalate local privileges through page-cache corruption.

The investigation is still ongoing, and this security notice (SN) is released based on Huawei's current findings. Huawei PSIRT will update this SN as new information emerges.

(Vulnerability ID:HWPSIRT-2026-27380)

HWPSIRT-2026-27380:

The vulnerability has been publicly disclosed.

2026-05-08 V1.0 Initial Release;

None

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To enjoy Huawei PSIRT services and obtain Huawei product vulnerability information, please visit http://www.huawei.com/en/psirt.

To report a security vulnerability in Huawei products and solutions, please send it to PSIRT@huawei.com. For details, please visit http://www.huawei.com/en/psirt/report-vulnerabilities.

This document is provided on an "AS IS" basis and does not imply any kind of guarantee or warranty, either express or implied, including the warranties of merchantability or fitness for a particular purpose. In no event shall Huawei or any of its directly or indirectly controlled subsidiaries or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages. Your use of the document, by whatsoever means, will be totally at your own risk. Huawei is entitled to amend or update this document from time to time.