CVE-2026-49428 (High) detected in src4.0.4

[mend-bolt-for-github]

CVE-2026-49428 - High Severity Vulnerability

Vulnerable Library - src4.0.4

Library home page: https://github.com/MidnightBSD/src.git

Found in base branches: stable/4.0, master

Vulnerable Source Files (1)

/sys/kern/uipc_shm.c

Vulnerability Details

Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this.
An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

Publish Date: 2026-08-19

URL: CVE-2026-49428

CVSS 3 Score Details (8.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Local
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-08-19

Fix Resolution: https://github.com/freebsd/freebsd-src.git - release/15.1.0-p1,https://github.com/freebsd/freebsd-src.git - release/15.0.0-p11,https://github.com/freebsd/freebsd-src.git - release/14.4.0-p7,https://github.com/freebsd/freebsd-src.git - release/14.3.0-p16

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