Improper input validation in Linux
CVE-2026-46243
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 ci…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.000 (4.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Linux — versions f1d662a7d5e5322e583aad6b3cfec03d8f27b435, 2.6.24, 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- 134c704f-9b21-4f2e-91b3-4a467353bcc0
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2026-46243?
- CVE-2026-46243 is a high-severity vulnerability in Linux, classified under Improper Input Validation. CVSS score: 7.1/10. Published 2026-06-01.
- How severe is CVE-2026-46243?
- High severity. CVSS v3 base score is 7.1 out of 10.
- Is CVE-2026-46243 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.