ASLR bypass for setuid executables via procctl(2)_CVE-2026-49414

7.8 / 10

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-49414

Source freebsd

Published Jun 27, 2026 at 09:22

Modified Jun 29, 2026 at 13:04

Affected Product

Vendor FreeBSD

Product FreeBSD

Version 15.0-RELEASE

Affected Versions FreeBSD FreeBSD 15.0-RELEASE
FreeBSD FreeBSD 14.4-RELEASE
FreeBSD FreeBSD 14.3-RELEASE

CWE Classification

CWE-179

References

security.freebsd.org /advisories/FreeBSD-SA-26:32.elf.asc

{
    "lastseen": "",
    "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.\n\nAn 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.",
    "published": "2026-06-27T09:22:23.307Z",
    "modified": "2026-06-29T13:04:45.409Z",
    "type": "cve",
    "title": "ASLR bypass for setuid executables via procctl(2)",
    "source": "freebsd",
    "references": "https://security.freebsd.org/advisories/FreeBSD-SA-26:32.elf.asc",
    "id": "CVE-2026-49414",
    "bulletinFamily": "",
    "cwe": [
        "CWE-179"
    ],
    "cvelist": null,
    "sourceData": "FreeBSD FreeBSD 15.0-RELEASE\nFreeBSD FreeBSD 14.4-RELEASE\nFreeBSD FreeBSD 14.3-RELEASE",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "FreeBSD",
    "version": "15.0-RELEASE",
    "vendor": "FreeBSD",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}