Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H H N 7.1 .0038 31.0 —
AFFECTED Product Versions Fixed Linux f1d662a7d5e5322e583aad6b3cfec03d8f27b435 – — Linux 2.6.24 – 5.10.258
TIMELINE May 13 Reserved by Linux Jun 1 EXPLOIT PUBLISHED — CVE-2026-46243 (Linux). Public exploit reference added. Jun 1 Published (CNA: Linux)
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.
| Date | Event | Detail |
|---|---|---|
| May 13, 2026 | Reserved | Reserved by Linux |
| June 1, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-46243 (Linux). Public exploit reference added. |
| June 1, 2026 | Published | Published (CNA: Linux) |
Authoritative record: CVE-2026-46243 at cve.org
Vendors: linux
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-46243 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.