CVE-2026-49414 Details
Description
The ELF image activator cleared per-process ASLR preference flags for setuid binaries after the code that computes the PIE base address, rather than before. As a result, a user-requested ASLR disable was still in effect at the point where the base address was chosen. An unprivileged local user can disable ASLR for a setuid PIE binary by calling procctl(2) before execve(2). This makes exploitation of any separate memory corruption vulnerability in that binary significantly easier.
A vulnerability exists in FreeBSD's handling of Address Space Layout Randomization (ASLR) for setuid Position-Independent Executables (PIEs). The issue arises because the ELF image activator clears per-process ASLR preference flags for setuid binaries after determining the PIE base address, rather than before. This timing flaw allows an unprivileged local user to disable ASLR for a setuid PIE binary by using the procctl system call before executing the binary. Consequently, this makes it easier to exploit any existing memory corruption vulnerabilities within that binary.
Users can upgrade to a supported FreeBSD stable or release/security branch dated after the correction date. Instructions for updating via the pkg utility, freebsd-update utility, or by applying a source code patch are available in the FreeBSD Security Advisory.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jun 29, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://security.freebsd.org/advisories/FreeBSD-SA-26:32.elf.asc | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-179 | Incorrect Behavior Order: Early Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| freebsd freebsd | 14.3 - 14.3 p1 14.3 p10 14.3 p11 14.3 p12 14.3 p13 14.3 p14 14.3 p2 14.3 p3 14.3 p4 14.3 p5 14.3 p6 14.3 p7 14.3 p8 14.3 p9 14.4 - 14.4 p1 14.4 p2 14.4 p3 14.4 p4 14.4 p5 15.0 - 15.0 p1 15.0 p2 15.0 p3 15.0 p4 15.0 p5 15.0 p6 15.0 p7 15.0 p8 15.0 p9 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 1, 2026 | Initial Analysis | [email protected] |
| Jun 29, 2026 | CVE Modified | CISA-ADP |
| Jun 27, 2026 | New CVE Received | [email protected] |