# CVE-2026-99279: Linux kernel ksmbd session reclamation resource leak

Source: https://junglewise.ai/threats/cve-2026-99279-in-the-linux-kernel-the-following-vulnerability-has-been-resolved  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-07. Updated: 2026-11-07  
License: CC BY 4.0 with a link back

CVE-2026-99279 · Severity: info · Published 2026-11-07

The Linux kernel's ksmbd file server implementation failed to properly clean up expired sessions, allowing memory and connection resources to accumulate. An attacker could exhaust server resources by triggering repeated session logoffs and expirations, potentially degrading file server availability or causing denial of service.

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

## Quick answers

**Is CVE-2026-99279 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-99279 being exploited in the wild.

**How severe is CVE-2026-99279?** Informational severity, published 7 November 2026.

**Which products and versions are affected?** Linux Kernel prior to fix.

**Is there a fix for CVE-2026-99279?** 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-2026-99279 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-99279?** Check whether you run Linux Kernel at an affected version. 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 resource management vulnerability in ksmbd where ended sessions with expired credentials retained their memory allocations and connection slots, preventing proper reclamation. The fix implements session unpublishing on logoff, removes procfs entries under proper locking, and ensures expiration workers reclaim only truly expired sessions with no active references, covering both SMB2 and SMB3 channel sessions.

## Affected products

- Linux Linux kernel prior to fix

## Timeline

- 2026-11-07: disclosed

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