CVE-2026-43350

216.73.217.86

· Published 08/05/2026 14:16 · Modified 08/05/2026 14:16

Labels: CVE-2026-43350 2026-05-08 416baaa9-dc9f-4396-8d5f-8c081fb06d67 CVE-2026-43350

Essential information

Published: 08/05/2026 14:16
Modified: 08/05/2026 14:16
Author: —
Creator: —
CVSS: 7.6 HIGH (v3.1)
CISA KEV: No
CWE: —
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CVSS metrics

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: require a full NFS mode SID before reading mode bits parse_dacl() treats an ACE SID matching sid_unix_NFS_mode as an NFS mode SID and reads sid.sub_auth[2] to recover the mode bits. That assumes the ACE carries three subauthorities, but compare_sids() only compares min(a, b) subauthorities. A malicious server can return an ACE with num_subauth = 2 and sub_auth[] = {88, 3}, which still matches sid_unix_NFS_mode and then drives the sub_auth[2] read four bytes past the end of the ACE. Require num_subauth >= 3 before treating the ACE as an NFS mode SID. This keeps the fix local to the special-SID mode path without changing compare_sids() semantics for the rest of cifsacl.

NVD status

Status: Modified — CVE has been recently published to the CVE List and has been received by the NVD.
Source: nist-nvd-api
NVD: View on NVD

Affected products (CPE)

Product	CPE
linux / linux kernel	`cpe:2.3:o:linux:linux_kernel::::::::`