CVE-2026-46243
7.1 HIGHIn the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego ...
Published: 2026-06-01 · Last updated: 2026-06-09
Severity and scoring
- CVSS
- 7.1 HIGH
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- CWE
- CWE-20
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin. Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-46243
- [Patch]https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7
- [Patch]https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079
- [Patch]https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2
- [Patch]https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981
- [Patch]https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8
- [Patch]https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824
- [Patch]https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013d
- [Patch]https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbc
- [Other]http://www.openwall.com/lists/oss-security/2026/06/01/6
- [Other]https://github.com/manizada/CIFSwitch
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