# CVE-2026-99206: Linux kernel iSCSI target double-free in discovery auth updates

Source: https://junglewise.ai/threats/cve-2026-99206-in-the-linux-kernel-the-following-vulnerability-has-been-resolved  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-28. Updated: 2026-10-28  
License: CC BY 4.0 with a link back

CVE-2026-99206 · Severity: info · Published 2026-10-28

The Linux kernel's iSCSI target implementation handles storage area network authentication. A race condition in concurrent configuration updates can cause a double-free memory corruption, potentially leading to kernel crash or code execution on systems with iSCSI target enabled.

Technologies: [Linux kernel](https://junglewise.ai/threats/technologies/x-linux-kernel).

## Quick answers

**Is CVE-2026-99206 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-99206 being exploited in the wild.

**How severe is CVE-2026-99206?** Informational severity, published 28 October 2026.

**Which products and versions are affected?** Linux kernel All versions prior to the fix (introduced by commit e15b81f602ed).

**Is there a fix for CVE-2026-99206?** 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-2026-99206 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-99206?** 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 double-free vulnerability exists in iscsi_update_param_value() when concurrent configfs opens update the discovery AuthMethod parameter without synchronization. The fix adds proper locking with the discovery TPG access lock (iscsit_get_tpg/iscsit_put_tpg) to protect the lookup and replacement of authentication parameters, matching the pattern used elsewhere in the TPG configfs parameter update code.

## Affected products

- Linux kernel All versions prior to the fix (introduced by commit e15b81f602ed)

## Timeline

- 2026-10-28: disclosed
- 2026-08-11: other: Patch commit authored

## References

- [https://git.kernel.org/stable/c/6caa2b3edb7da4f50a38e16561b75fcae21d4099](https://git.kernel.org/stable/c/6caa2b3edb7da4f50a38e16561b75fcae21d4099)
- [https://git.kernel.org/stable/c/9b07828b133b326cb4fb59f144ca37f8db535999](https://git.kernel.org/stable/c/9b07828b133b326cb4fb59f144ca37f8db535999)

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