CVE-2025-38723: LoongArch: BPF: Fix jump offset calculation in tailcall
CVE-2025-38723 is a vulnerability in LoongArch: BPF: Fix jump offset calculation in tailcall, rated Moderate by Microsoft, with a CVSS 3.1 base score of 5.5 (Medium). An attacker can exploit it by an attacker with local access, with low privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.17% probability of exploitation activity in the next 30 days, higher than 6% of all scored vulnerabilities. Microsoft released the fix on 5 September 2025 in the September 2025 Patch Tuesday. It affects 2 products in 1 product family (Open Source Software).
Microsoft scores CVE-2025-38723 at 5.5 (temporal 5.5) using CVSS 3.1. Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Metric
Value
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High
Frequently asked questions (Microsoft)
Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.