CVE-2026-46054

Advisory lineage Upstream: 0 Downstream: 8
Analyzed
Published: 27 May 2026, 12:57
Last modified:21 Jul 2026, 12:05

Vulnerability Summary

Overall Risk (default)
medium
28/100
CVSS Score
7.1 HIGH
v3.1 (cve.org)
EPSS Score
0.12% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 May 2026, 12:57
Published
Vulnerability first disclosed
21 Jul 2026, 12:05
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: selinux: fix overlayfs mmap() and mprotect() access checks The existing SELinux security model for overlayfs is to allow access if the current task is able to access the top level file (the "user" file) and the mounter's credentials are sufficient to access the lower level file (the "backing" file). Unfortunately, the current code does not properly enforce these access controls for both mmap() and mprotect() operations on overlayfs filesystems. This patch makes use of the newly created security_mmap_backing_file() LSM hook to provide the missing backing file enforcement for mmap() operations, and leverages the backing file API and new LSM blob to provide the necessary information to properly enforce the mprotect() access controls.

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

EPSS Trends

Current EPSS score: 0.12%• Percentile: 2%

Techniques & Countermeasures

  • CWE-280•Improper Handling of Insufficient Permissions or Privileges

    The product does not handle or incorrectly handles when it has insufficient privileges to access resources or functionality as specified by their permissions. This may cause it to follow unexpected code paths that may leave the product in an invalid state.

Affected Systems

  • linux•linux

    ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cd0e707a927a70cdfd8bc5a512a9719a87f5ed51 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 82544d36b1729153c8aeb179e84750f0c085d3b1 | < 7.0.4 | ≥ 2f502839e85ab265f03f25f30d6463154aee5473, < bc6c380c1159de52a252ed11f19a42c47f60a735 | ≥ 2f502839e85ab265f03f25f30d6463154aee5473, < 8bacd09f12c27710228562e4d13163e58c5f4a45 | ≥ 2f502839e85ab265f03f25f30d6463154aee5473, < d844702198395d3f80222777030f69db6be6b709 | ≥ 2f502839e85ab265f03f25f30d6463154aee5473, < cd0e707a927a70cdfd8bc5a512a9719a87f5ed51 | ≥ 2f502839e85ab265f03f25f30d6463154aee5473, < 82544d36b1729153c8aeb179e84750f0c085d3b1 | 4.19

  • linux•linux kernel

    ≥ 4.19, < 7.0.4

References (12)