DEBIAN-CVE-2026-46243

Advisory lineage Upstream: 1 Downstream: 0
Upstream
CVE-2026-46243
Published: 01 Jun 2026, 17:17
Last modified:15 Jun 2026, 09:01

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

01 Jun 2026, 17:17
Published
Vulnerability first disclosed
15 Jun 2026, 09:01
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected Systems

  • debian•linux

    all | < 5.10.257-1 | < 6.1.174-1 | < 6.12.90-2 | < 7.0.10-1

References (1)