CVE-2026-35547— Heap overflow in libnv
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I. Basic Information for CVE-2026-35547
Vulnerability Information
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Vulnerability Title
Heap overflow in libnv
Source: NVD (National Vulnerability Database)
Vulnerability Description
When processing the header of an incoming message, libnv failed to properly validate the message size. The lack of validation allows a malicious program to write outside the bounds of a heap allocation. This can trigger a crash or system panic, and it may be possible for an unprivileged user to exploit the bug to elevate their privileges.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
堆缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeBSD 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在安全漏洞，该漏洞源于处理传入消息标头时未能正确验证消息大小，可能导致恶意程序写入堆分配边界之外，进而触发崩溃或系统恐慌，并可能被利用提升权限。
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
II. Public POCs for CVE-2026-35547
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Same Patch Batch · FreeBSD · 2026-04-30 · 6 CVEs total
| CVE-2026-42511 | Remote code execution via malicious DHCP options | |
| CVE-2026-7164 | pf can overflow the stack parsing crafted SCTP packets | |
| CVE-2026-7270 | Local privilege escalation via execve() | |
| CVE-2026-42512 | Remotely triggerable out-of-bounds heap write in dhclient | |
| CVE-2026-39457 | Stack overflow via select() file descriptor set overflow |
IV. Related Vulnerabilities
Same product: FreeBSD
- CVE-2026-39457
Stack overflow via select() file descriptor set overflow - CVE-2026-42512
Remotely triggerable out-of-bounds heap write in dhclient - CVE-2026-7164
pf can overflow the stack parsing crafted SCTP packets - CVE-2026-7270
Local privilege escalation via execve() - CVE-2026-42511
Remote code execution via malicious DHCP options
Same vendor: FreeBSD
- CVE-2026-39457
Stack overflow via select() file descriptor set overflow - CVE-2026-42512
Remotely triggerable out-of-bounds heap write in dhclient - CVE-2026-7164
pf can overflow the stack parsing crafted SCTP packets - CVE-2026-7270
Local privilege escalation via execve() - CVE-2026-42511
Remote code execution via malicious DHCP options
Same weakness: CWE-122
- CVE-2026-8261
Squirrel sqobject.cpp Load heap-based overflow - CVE-2026-8213
OSGeo gdal Grid File GDapi.c GDSDfldsrch heap-based overflow - CVE-2026-8212
OSGeo gdal SWapi.c SWSDfldsrch heap-based overflow - CVE-2026-42309
Pillow: Heap buffer overflow with nested list coordinates - CVE-2026-45130
Vim: Heap Buffer Overflow in spell file loading
V. Comments for CVE-2026-35547
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