High7.8Red Hat & Ubuntu Linux
Linux kernel: smb: client: reject userspace cifs.spnego descriptions
CVE-2026-46243 Published May 26, 2026
CVE-2026-46243
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Linux kernel: smb: client: reject userspace cifs.spnego descriptions. Red Hat rates this important (CVSS 7.8). Weakness: CWE-825. Affected package(s): kernel, kernel-rt, rhcos, kpatch-patch. Resolved in Red Hat advisory RHSA-2026:33219 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:4.18.0-305.194.1.el8_4
- kernel-0:4.18.0-553.129.1.el8_10
- kernel-0:2.6.32-754.61.1.el6
- kernel-rt-0:4.18.0-553.129.1.rt7.470.el8_10
- rhcos-414.92.202606231112-0
- kernel-0:4.18.0-372.196.1.el8_6
- kernel-0:6.12.0-212.9.el10nv
- kpatch-patch
- kernel-0:5.14.0-570.123.1.el9_6
- kernel-0:3.10.0-1160.153.1.el7
- kernel-0:5.14.0-284.176.1.el9_2
- kernel-rt-0:5.14.0-284.176.1.rt14.461.el9_2
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- RHSA-2026:33219
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:33219 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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