CVE-2026-45259— sigqueue(2) missing capability mode restriction
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-45259
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
sigqueue(2) missing capability mode restriction
Source: NVD (National Vulnerability Database)
Vulnerability Description
sigqueue(2) was marked as permitted in capability mode with the introduction of Capsicum in 2011, but the implementation of kern_sigqueue did not include a capability mode check restricting signal delivery to the calling process's own PID. A process in capability mode can use sigqueue(2) to send signals to any process it could signal following standard Unix permissions, bypassing the Capsicum sandbox restriction. A compromised sandboxed process could interfere with other processes, for example by sending SIGKILL or SIGSTOP. This could be any process running as the same user, or any process, for a superuser sandboxed process.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权授予不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
FreeBSD 权限许可和访问控制问题漏洞
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存在权限许可和访问控制问题漏洞，该漏洞源于Capsicum模块中kern_sigqueue实现缺少能力模式检查，可能导致沙盒进程绕过限制向其他进程发送信号。
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-2026-45259
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-45259
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-45259 (1)
Same Patch Batch · FreeBSD · 2026-06-27 · 7 CVEs total
| CVE-2026-49416 | Integer overflow in vt(4) CONS_HISTORY ioctl | |
| CVE-2026-49414 | ASLR bypass for setuid executables via procctl(2) | |
| 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-2026-45258 | 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
- CVE-2026-49416
Integer overflow in vt(4) CONS_HISTORY ioctl - CVE-2026-49414
ASLR bypass for setuid executables via procctl(2) - CVE-2026-49413
Flaw in Linuxulator execution of setugid binaries - CVE-2026-49412
Use-after-free bug in the IPV6_MSFILTER socket option handle - CVE-2026-45258
Multiple vulnerabilities in the sound(4) mmap path
Same vendor: FreeBSD
- CVE-2026-49416
Integer overflow in vt(4) CONS_HISTORY ioctl - CVE-2026-49414
ASLR bypass for setuid executables via procctl(2) - CVE-2026-49413
Flaw in Linuxulator execution of setugid binaries - CVE-2026-49412
Use-after-free bug in the IPV6_MSFILTER socket option handle - CVE-2026-45258
Multiple vulnerabilities in the sound(4) mmap path
Same weakness: CWE-266
- CVE-2026-57501
Zen: Context-menu "Open link in glance" / "Split link in new - CVE-2026-33390
Incorrect privilege assignment for Arc sensors in Guardian/C - CVE-2026-26053
Gallagher Command Centre Server 权限许可和访问控制问题漏洞 - CVE-2026-59093
Weaviate < 1.38.0 - Privilege Escalation via Unchecked Permi - CVE-2026-57692
WordPress PrivateContent plugin <= 9.9.2 - Privilege Escalat
V. Comments for CVE-2026-45259
No comments yet