# CVE-2026-45476: Linux MANA Driver use after free privilege escalation

Source: https://junglewise.ai/threats/cve-2026-45476-linux-mana-driver-use-after-free-privilege-escalation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-09. Updated: 2026-06-09  
License: CC BY 4.0 with a link back

CVE-2026-45476 · Severity: high · CVSS 8.2 · Published 2026-06-09

A security vulnerability exists in the Microsoft Azure Network Adapter (MANA) driver for Linux, which manages high-performance network interfaces in cloud environments. An attacker who already has high-level access to a system could exploit this flaw to gain full control over the underlying operating system. This could lead to a complete compromise of the affected server, allowing the attacker to access sensitive data or disrupt services.

Technologies: [Linux Kernel](https://junglewise.ai/threats/technologies/kernel). Vendors: [Linux](https://junglewise.ai/threats/vendors/linux).

## Quick answers

**Is CVE-2026-45476 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45476 being exploited in the wild.

**How severe is CVE-2026-45476?** High severity, with a CVSS score of 8.2, published 9 June 2026.

**Which products and versions are affected?** Linux Linux Kernel MANA Driver.

**Is there a fix for CVE-2026-45476?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-45476 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-45476?** Check whether you run Linux Kernel. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A use-after-free (UAF) vulnerability exists within the Linux MANA (Microsoft Azure Network Adapter) driver, identified as CWE-416. The flaw is triggered when the driver incorrectly manages memory references, allowing an attacker to access or manipulate memory after it has been freed. This is a local attack requiring high privileges (PR:H) but no user interaction. Successful exploitation allows the attacker to escape restricted environments or elevate privileges to the kernel level, potentially leading to a full system compromise. The vulnerability is tracked under CVE-2026-45476 and was reported by Microsoft.

## Affected products

- Linux Linux Kernel MANA Driver

## Timeline

- 2026-06-09: disclosed: Initial disclosure by Microsoft and NVD publication.

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45476](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45476)

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