Race condition in Linux kernel iSCSI discovery auth updates
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 6 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
The Linux kernel iSCSI target is affected in how it updates the discovery AuthMethod parameter. Separate configfs opens can change this parameter concurrently, so two callers may free the same value in iscsi_update_param_value(), causing a double-free.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix race in discovery auth updates Separate configfs opens can concurrently update the discovery AuthMethod parameter. Both callers may free the same value in iscsi_update_param_value(), causing a double-free. Protect the lookup and replacement with the discovery TPG access lock, as used by the other TPG configfs parameter updates.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
Upgrade the Linux kernel to 5.10.273, 5.15.224, 6.1.191, 6.6.161, 6.12.115, 6.18.59, 7.2.13 or 7.3. Red Hat Enterprise Linux 7, 8, 9 and 10 and Red Hat OpenShift Container Platform 4 and 5 are affected with no fix available.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
- Fix · CNA Linux (Linux) Fixed in 5.10.273, 5.15.224, 6.1.191, 6.6.161, 6.12.115, 6.18.59, 7.2.13, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-28 Threatist record created from CVE-2026-99206
- 2026-10-28 Alias added: GHSA-mw2h-565q-xw3m
- 2026-10-29 Affected versions changed · Red Hat
- 2026-10-29 CVSS score added · Red Hat
- 2026-10-30 Fix available: Linux/Linux@083eea404d162c324456cf4ff9912fe8701d936b, Linux/Linux@128dfa7a9b4b3c956e8ac04a169a7ba04960cd75, Linux/Linux@35f3eb8ba914cbe079faf8712101b94ce6b2d821 +7 · CNA
- 2026-10-30 5 new references · CNA
- 2026-11-06 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/128dfa7a9b4b3c956e8ac04a169a7ba04960cd75
- https://git.kernel.org/stable/c/35f3eb8ba914cbe079faf8712101b94ce6b2d821
- https://git.kernel.org/stable/c/3b206898acaf40f87cf59e97e511a6b60aad9d5e
- https://git.kernel.org/stable/c/57b6ebcc83afb5338c561ff97ca85dc954a89136
- https://git.kernel.org/stable/c/083eea404d162c324456cf4ff9912fe8701d936b
- https://git.kernel.org/stable/c/9b07828b133b326cb4fb59f144ca37f8db535999
- https://git.kernel.org/stable/c/6caa2b3edb7da4f50a38e16561b75fcae21d4099
- https://git.kernel.org/stable/c/e15b81f602edbdee39c335546f25486a1747f3f0
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Sources
- CVE-2026-99206 · CVE Program
- CVE-2026-99206 · NVD
- FIRST EPSS
- GHSA-mw2h-565q-xw3m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-99206 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences