CVE-2026-49415 (High) detected in src4.0.4

[mend-bolt-for-github]

CVE-2026-49415 - 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/fs/procfs/procfs_mem.c

Vulnerability Details

During execve(2) of a SUID binary, the new virtual address space is installed before the process credentials are updated. During this window, a process running as the same user can access the target process's memory via procfs or linprocfs, because the kernel's debugging permission check still saw the original credentials.
An unprivileged local user can exploit this race to modify the address space of a SUID binary before its credentials are elevated, potentially gaining full control of the affected system.

Publish Date: 2026-08-19

URL: CVE-2026-49415

CVSS 3 Score Details (8.8)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • 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/15.0.0-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,https://github.com/freebsd/freebsd-src.git - release/15.1.0-p1

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