CVE-2026-45253— Missing validation in ptrace(PT_SC_REMOTE)
Possible ATT&CK Techniques 2AI
T1055 · Process Injection T1068 · Exploitation for Privilege EscalationGet alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-45253
Vulnerability Information
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Vulnerability Title
Missing validation in ptrace(PT_SC_REMOTE)
Source: NVD (National Vulnerability Database)
Vulnerability Description
ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges. The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存写
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeBSD 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD存在缓冲区错误漏洞，该漏洞源于ptrace(PT_SC_REMOTE)未正确验证syscall(2)和__syscall(2)元系统调用的参数，可能导致具有调试进程能力的用户在内核中触发任意代码执行，从而允许无特权的本地用户提升权限，可能完全控制受影响系统。
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-2026-45253
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Vendor Advisories for CVE-2026-45253 (1)
Same Patch Batch · FreeBSD · 2026-05-21 · 7 CVEs total
| CVE-2026-45250 | Stack buffer overflow via setcred(2) | |
| CVE-2026-45252 | Heap overflow in FUSE_LISTXATTR | |
| CVE-2026-45255 | Remote code execution via installer Wi-Fi access point scans | |
| CVE-2026-45251 | Kernel use-after-free via file descriptor syscalls | |
| CVE-2026-45254 | Incorrect libcap_net limitation list manipulation | |
| CVE-2026-39461 | select(2) file descriptor set overflow causes stack overflow |
IV. Related Vulnerabilities
Same product: FreeBSD
- CVE-2026-45254
Incorrect libcap_net limitation list manipulation - CVE-2026-45255
Remote code execution via installer Wi-Fi access point scans - CVE-2026-39461
select(2) file descriptor set overflow causes stack overflow - CVE-2026-45252
Heap overflow in FUSE_LISTXATTR - CVE-2026-45251
Kernel use-after-free via file descriptor syscalls
Same vendor: FreeBSD
- CVE-2026-45254
Incorrect libcap_net limitation list manipulation - CVE-2026-45255
Remote code execution via installer Wi-Fi access point scans - CVE-2026-39461
select(2) file descriptor set overflow causes stack overflow - CVE-2026-45252
Heap overflow in FUSE_LISTXATTR - CVE-2026-45251
Kernel use-after-free via file descriptor syscalls
V. Comments for CVE-2026-45253
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