CVE-2026-45254— Incorrect libcap_net limitation list manipulation
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-45254
Vulnerability Information
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Vulnerability Title
Incorrect libcap_net limitation list manipulation
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the case of the cap_net service, when a key present in the old limit was omitted from the new limit, the missing key was treated as "allow any" instead of being rejected. In certain scenarios, an application that had previously restricted a subset of network operations could ask for a new limit that extended the permissions of the process.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
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cap_net服务中，当新限制省略旧限制中的键时，缺失键被当作允许任何操作处理，可能导致先前限制部分网络操作的应用程序请求新限制时扩展进程权限。
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-2026-45254
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Vendor Advisories for CVE-2026-45254 (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-2026-45253 | Missing validation in ptrace(PT_SC_REMOTE) | |
| CVE-2026-39461 | select(2) file descriptor set overflow causes stack overflow |
IV. Related Vulnerabilities
Same product: FreeBSD
- 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-2026-45253
Missing validation in ptrace(PT_SC_REMOTE) - CVE-2026-45252
Heap overflow in FUSE_LISTXATTR - CVE-2026-45251
Kernel use-after-free via file descriptor syscalls
Same vendor: FreeBSD
- 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-2026-45253
Missing validation in ptrace(PT_SC_REMOTE) - CVE-2026-45252
Heap overflow in FUSE_LISTXATTR - CVE-2026-45251
Kernel use-after-free via file descriptor syscalls
Same weakness: CWE-269
- CVE-2026-8787
Firebase Support & Chat Management <= 3.1.1 - Missing Author - CVE-2026-9490
Acer Care Center creates a Named Pipe with a weak Security D - CVE-2026-6419
Wishlist Member <= 3.30.1 - Missing Authorization to Authent - CVE-2026-6897
Wishlist Member <= 3.30.1 - Missing Authorization to Authent - CVE-2026-6895
Wishlist Member <= 3.30.1 - Missing Authorization to Authent
V. Comments for CVE-2026-45254
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