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

Quick assessment

Affected
FreeBSD FreeBSD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeBSD是FreeBSD基金会开源的一套类Unix操作系统。 FreeBSD存在处理逻辑错误漏洞，该漏洞源于ELF映像激活程序在计算PIE基地址后清除每个进程ASLR偏好标志，导致用户请求的ASLR禁用生效，可能使未授权本地用户在调用execve(2)前使用procctl(2)禁用setuid PIE二进制文件的ASLR，从而更容易利用该二进制文件中的内存损坏漏洞。

AI Predicted 7.8 Difficulty: Easy EPSS 0.15% · P4

Affected Version Matrix 3

VendorProduct Version RangeStatus
FreeBSD FreeBSD 15.0-RELEASE< p10 affected
14.4-RELEASE< p6 affected
14.3-RELEASE< p15 affected
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I. Basic Information for CVE-2026-49414

Vulnerability Information
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Vulnerability Title
ASLR bypass for setuid executables via procctl(2)
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的行为次序：过早验证
Source: CVE Program / CVE List V5
Vulnerability Title
FreeBSD 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会开源的一套类Unix操作系统。 FreeBSD存在处理逻辑错误漏洞，该漏洞源于ELF映像激活程序在计算PIE基地址后清除每个进程ASLR偏好标志，导致用户请求的ASLR禁用生效，可能使未授权本地用户在调用execve(2)前使用procctl(2)禁用setuid PIE二进制文件的ASLR，从而更容易利用该二进制文件中的内存损坏漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeBSD FreeBSD 15.0-RELEASE ~ p10 -

II. Public POCs for CVE-2026-49414

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III. Intelligence Information for CVE-2026-49414

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Vendor Advisories for CVE-2026-49414 (1)

Same Patch Batch · FreeBSD · 2026-06-27 · 7 CVEs total

CVE-2026-49416 Integer overflow in vt(4) CONS_HISTORY ioctl
CVE-2026-49413 Flaw in Linuxulator execution of setugid binaries
CVE-2026-49412 Use-after-free bug in the IPV6_MSFILTER socket option handler
CVE-2026-45259 sigqueue(2) missing capability mode restriction
CVE-2026-45258 Multiple vulnerabilities in the sound(4) mmap path
CVE-2026-49417 Multiple vulnerabilities in the sound(4) mmap path

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD
Same weakness: CWE-179

V. Comments for CVE-2026-49414

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